New 0-100 Gauge is added, called the 'Vigilance Gauge'. As you do your duty as one of Nature's Wardens (aka, when you cast spells that cost MP), you gain Vigilance.
Glare: Filler spell, 350p. Generates 1 point of 'Vigilance'
Dia: 250p on cast, 12s DOT of 70p, total of 530p. Generates 1 point of 'Vigilance' on cast, and 1 point each time it deals damage over time.
Banish: New button, instantcast GCD. Starts as Water from the level 15 Job quest, upgrades whenever Stone does. Always 40p stronger than Stone/Glare (at max level, 390p). Has a 15s CD. Grants 5 'Vigilance'
Holy generates 2 'Vigilance' per enemy hit.
Cure2 generates 5 'Vigilance' when cast.
Regen generates 4 'Vigilance' when cast, and 1 per tick, for a total of 10.
Medica 3 generates 3 'Vigilance' whenever a tick heals the WHM, for a total of 15.
Cure3 generates 20 'Vigilance'.
Blessing of the Elementals: AOE Heal, GCD, 750p. Costs 50 Vigilance (giving it a pseudo-CD of around 1min when fully DPS-focused, lower if using GCD healing).
Grants a Petal of Ireful Earth, Petal of Wrathful Winds, and Petal of Raging Rivers to the Job Gauge. You can hold up to two of each Petal.
(Learned from the level 50 Job quest instead of Benediction, which is moved to 'just reach level 50 and you get it')
Quake: 450p, 50% less to nearby targets. Glare becomes Quake when a Petal of Ireful Earth is present on the Job Gauge.
Tornado: 300p on cast, 12s DOT of 95p, total of 680p. 50% less to nearby targets (the DOT is also applied to nearby targets at 50% potency). Dia becomes Tornado when a Petal of Wrathful Winds is present on the Job Gauge.
Flood: 490p, 50% less to nearby targets. Banish becomes Flood when a Petal of Raging Rivers is present on the Job Gauge.
This idea was written during the leadup to Dawntrail, and so the original intention was that, a player who just wants to play WHM could use the healing action whenever they need to heal, and their damage is automatically refunded when they use the now-flashing buttons of Quake, Flood and Tornado. But for an optimization-minded player, they'd want to try and wrangle their Healing CD use, such that the last GCD they use before the 2min window is Blessing of the Elementals, so that their Burst window is Misery, Quake, Flood, Tornado and their three uses of Glare 4. Of course, that doesn't matter as much now that we won't be having 2min burst windows in Evercold. The casual player, more likely to make use of 'damage-loss GCD Healing' like Regen or Medica3, would see their Gauge generation speed massively increased, and so while it wouldn't give them 100% damage-neutrality, it'd help them retain more of their damage compared to the current Dawntrail design
Besides that, though, it'd also mean we'd go from one button in AOE situations (Holy spam) to as many as FIVE (Holy, BOTE, Quake, Flood, Tornado) should the player wish to make use of that many, and it'd allow WHM a way to apply their DOT in an AOE (which would then accelerate how fast the Gauge is generated, giving them even faster access to more Healing from using BOTE again). The player would also be able to 'prepare' Gauge at the end of a boss in a dungeon, and go into the next trash pull with a Misery, and two casts of each of Quake, Tornado and Flood. WHM (along with BLM) caused a Calamity, and players would get to see how first-hand, as they tear dungeon trash mobs apart with elemental devastation