Tired with hundreds of mindless job proposals? Me too, but I want to make another suggestion. You can criticise me later if you want, but at least try to understand the concept and don't look at the numbers, they are for the sake of being there.
The Idea
My first idea came from Arcanist job from Final Fantasy Tactics Advance 2. In Spanish the name was Ocultista which means Occultist => Necromancer. It was a mage that throw dark aspected spells and some kind of spells that could hit you if your level was multiple of 3, 5... Well the important aspect is the use of dark magics. But we already have the Black Mage, so how can we fit this mage ingame? Making it a healer! I'm tired of healers with Golden/Green/White particles. We need (I want) a new healer with another vision about healing. What about a healer that draws magic from the void and turns it into healing power? And that's how it came the idea. An Occultist is a person that manipulates energy from the void and voidsents and infuses it to people and heals them.
How could we fit Occultist in FFXIV lore?
That's more complicated but not really much, we already have the War of the Magi. The overuse of White Magics was condemned by an elemental and punished with a flooding. Survivors of this catastrophe in order to overcome the environment after that disaster decided to use the same kind of magics that they destroyed their city in that war, but because they were before White Mages a new kind of healing magic was born.
Well it's a bad story it needs a lot more of context, but people who know about the War of the Magi, 3 factions, Amdapor, Diabolos and the flooding might understand how the story goes.
Resume of the story: What doesn't kill you (Destructive Void magics and Overuse of White Magics), I mix it and convert it into a new kind of magic and "Voila" Occultism was born.
Magics, abilities and Mechanics
WHM has raw big healing, SCH has fairies, AST has cards and aspects...
Occultist will have a well, a void Well. Why? Because they can!
The Void Well allows the Occultist to acumulate Void. How? Performing damaging magics or magics specialized in replenishing the Well. With that void they can use other abilities which are more potent and bring big heals or even more damaging abilities.
The Void Well goes from 0% to 100% it can't surpass 100%.
And here will go the spoiler tag with all the abilities with some numbers which can be ignored for the sake of balance and some traits:
Abilities and Magics
Lvl 1: Darkness
Deals unaspected damage. Potency: 150
Replenishes 5% the Void Well
Lvl 2: Infusion
Restores target HP Cure potency: 400
Replenishes 5% the Void Well
Lvl 4: Condemn
Deals unaspected damage over time. Potency: 20 Duration: 15 seconds
After 15 seconds deals unaspected damage. Potency: 100
Combined Total Potency: 220
Instant Cast
Replenishes 5% the Void Well
Lvl 6: Void Trance
When activated damaging spells use Mind attribute instead of Intelligence and grants +20% accuracy. Healing potency reduced 33%. Healing abilities don't replenish the Void Well whereas damaging abilities replenish it 50% more. Effect ends upon reuse
Instant Cast
Cooldown: 5 seconds.
Lvl 8: Dark Curtain
Grants an ally a barrier that lasts 10 seconds. The next spell or ability recieved destroys the barrier but blocks 10% of that damage.
Instant Cast
Trait Void Curtain: Dark Curtain restores the same HP it blocked.
Lvl 10: Soul Saver
Resurrects a target to a weakened state.
Trait Soul Manipulator: Allows to use the ability in combat and the resurrected target isn't weakened.
Lvl 12: Expunge
Removes a single detrimental effect from target.
Lvl 15: Succubus Kiss
Deals unaspected damage. Potency: 150
Replenishes 25% the Void Well
Restores 5% MP
Instant Cast
Cooldown: 30 seconds
Lvl 18: Void Pool
Enemies inside the pool move 25% Slower.
Allies inside the pool move 25% Faster.
Drains 15% the Void Well (can't be used if you don't have at least your Void Well at 15%)
Instant Cast
Duration: 10 seconds
Cooldown: 30 seconds
Lvl 22: Void Conversion
While activated it Drains 10% the Void Well and Restores 2% MP per tick. (Can't be used if you don't have at least your Void Well at 10%).
Instant Cast. Effect ends upon reuse
Trait Enhanced Void Conversion: Increases the MP restored per tick up to 4%.
Lvl 26: Ahriman Lens:
Target ally won't miss any attack.
Drains 10% the Void Well
Duration: 15 seconds
Instant cast
Cooldown: 90 seconds
Trait Enhanced Lens: Grants +10% critical chance.
Lvl 30: Infusion II
Restores target HP Cure potency: 550
Replenishes 5% the Void Well
Lvl 30: Void Infusion
While activated every Infusion/Infusion II drains 10% the Void Well. Infusion/InfusionII potency is increased 25% and their MP cost is decreased 25%
Instant Cast. Effect ends upon reuse. (If your Void Well is less than 10% the effect ends and cannot be activated.)
Lvl 34: Dark Tether
The caster and an enemy are bound by a tether. If the caster moves the tether breaks.
While binded the caster restores 7.5% the Void Well and the enemy receives unaspected damage. Potency: 50
Combined Total Potency: 300
Combined Total Void Well restore: 45%
Duration: 18 seconds
Instant Cast
Cooldown: 60 seconds
Lvl 35: Beacon of Darkness
While activated it Drains 12,5% the Void Well and grants a healing aura.
Cure Potency: 100
Instant Cast
(Can't be used if you don't have at least your Void Well at 12,5%). Effect ends upon reuse.
Lvl 38: Vodoriga Slash
Deals unaspected damage in a cone form. Potency: 150
Replenishes 2,5% the Void Well x enemy hit.
Lvl 40: Sacrifice Pact
Restores target HP. Potency: 650
Instant Cast
The caster loses 10% of their maximum HP.
Consecutive casts place a debuff on the caster that doubles the lose of HP (10% → 20% → 40% → 80%)
The debuff lasts 30 seconds. If the ability was meant to kill you it wouldn't be activable.
Lvl 42: Condemn II
Deals unaspected damage over time. Potency: 25 Duration: 18 seconds
After 18 seconds deals unaspected damage. Potency: 130
Combined Total Potency: 280
Replenishes 5% the Void Well
Lvl 45: Soul Mark
Target 1 ally. After 10 seconds or after you reactivate the ability the mark will explode and heal all nearby (6yt) party member. (It can't be reactivated until 3 seconds have passed) Cure potency: 400
Drains 20% the Void Well
(Can't be used if you don't have at least your Void Well at 20%).
Lvl 46: Void Passage
Target 1 party member. The ally moves 25% Faster 15 seconds. If that party member touches another one it grants the movement bonus and the caster replenishes 5% the Void Well
When the first bonus fades, all of them fade too.
Instant Cast
Cooldown: 75 seconds
Lvl 50: Diabolos' Nightmare:
Replenishes 100% the Void Well.
Deals damage over time to the target and nearby enemies. Void trance healing penalty removed for 15 seconds.
Potency: 50
Instant Cast
Duration: 15 seconds
Cooldown: 180 seconds
Lvl 50: Vampirism
Target 1 ally. The ally gets a buff that last 15 seconds. 40% of the damage done by that ally is converted to HP.
Instant Cast
Cooldown: 30 seconds.
Lvl 52: Veil of Darkness
Creates a Veil that covers all party members. Nullifies the next detrimental effect.
Cooldown: 60 seconds
Drains 15% the Void Well
(Can't be used if you don't have at least your Void Well at 15%).
Lvl 54: Darkness II
Deals unaspected damage. Potency: 200
Replenishes 5% the Void Well
Lvl 56: Shadowlurker
It spawns a Shadowlurker in the designated area. The shadowlurker will damage nearby enemies while healing the caster.
Potency: 25
Cure Potency: 50
Duration: 30 seconds
Lvl 58: Traumatize
Deals unaspected damage to the target and nearby enemies.
Potency: 200
If the target is alone. Potency: 300
Drains 25% the Void Well
(Can't be used if you don't have at least your Void Well at 20%).
Lvl 60: Vampiric Tendencies
All party member receive a buff that lasts 9 seconds. 10% of the damage done by all party members is healed to all party members.
(If the party deals 6000 DPS during those 9 seconds all party members will be healed [6000x10x9/100 = 5400])
Cooldown: 90 seconds.
Instant Cast
Drains 50% of the Void Well
(Can't be used if you don't have at least your Void Well at 50%).
Traits:
Lvl 8: The Void Well
Allows the replenishment of the Void Well
Lvl 14: Enhanced Mind
Increased Mind by 2
Lvl 16: Enhanced Mind II
Increased Mind by 4
Lvl 20: Maim and Mend
Increases base action damage and HP restoration by 10%
Lvl 24: Soul Manipulator
Allows casting Soul Saver while engaged in battle and the resurrected target isn't weakened
Lvl 28: Increased Mind III
Increased Mind by 6
Lvl 32: Void Curtain
Dark Curtain restores the same HP it blocked.
Lvl 36: Enhanced Infusion:
20% Chances that it will replenish 10% the Void Well and next Infusion II potency increased 33%.
Lvl 40: Maim and Mend II
Increases base action damage and HP restoration by 30%.
Lvl 44: Enhanced Lens
Grants +10% critical chance.
Lvl 48: Enhanced Void Conversion
Increases the MP restored per tick up to 4%.
You will notice that this Job only has 1 AoE heal and it has a small area. Well it's the weakness of the job. It doesn't have big AoE heals. But it has Beacon of Darkness which is supposed to be the AoE main healing tool. As long as you have it active your party HP will increase. It has some filler abilities like Ahriman Vision, that their main theme is about using the Void Creature powers. The job also fills the Vampirism niche. Healers are the best suited to have those kind of abilities, because their main job is healing. This job has lot of passive healing and relies a lot on party members.
Cross class skills ACN and THM, that means no Cleric Stance/Protect/Stone Skin. Void Trance is supposed to be the Cleric Stance of this Job, most tools to replenish the Void Well are damaging abilities, this class needs to damage in order to fill the Void Well effectively.
Remember numbers can be changed if you have to blame me, blame for my ideas not for the numbers, oh and answer those questions:
Do you think it would feel like a different kind of healer this job compared to the ones we have right now?
Would you play it if there was a similar healer playstyle ingame?