This is dove-tailing off of Gucci-Charms idea of non-rotation based instances/bossfights/raids.

Paragon & Trema (names can be changed, the point is you have an ancient master and a massive beast together): Via Infinito (16 man)

Via Infinito is (From FFX-2) an underground labyrinth under the great city of Bevelle IIRC. I don't see why a similar concept cannot be imported to FFXIV in Eorzea.

The fight is totally non scripted. Both bosses have no ability rotation. Damage taken is significantly reduced the further away the two bosses are from each other.

Trema attacks and abilities.

-Auto attack: His auto attack ability, similar to twintania's death sentence will be a key mechanic throughout the fight. The auto attack has a chance to inflict the following status effects: Poison, Heavy, Paralyze, Bind, or Reflect. The further away he gets from Paragon, the higher his AA speed gets. Eventually, at max range, he will be going MNK FFXI style 100 fists.

-Hamedo: Trema has a chance to Hamedo (FFT) your attacks, meaning that he evades it (deals 0 damage) and then counterattacks you. Since he is a master Disciple of War, he counters you with whatever you used. If you hit him with Chaos thrust, it delivers an attack to you of the same potency + the debuff. The rate at which hamedo procs is determined by his HP; the rate increases as he loses life.

-Disarm: Chance to disarm you of your weapon for 20 seconds. All stats from your weapon while disarmed are null & void. All weapon skills of disarmed players are disabled.

-Presence of the Master: Delivers an attack in a cone before him that drains affected players of all TP. Cast time: 5 seconds. The further away from Paragon he is, cast time is reduced.

-Eternity Vessel: Trema teleports to a random raid member. That player is now has top enmity. This attack has no cast time, can be used up to 3 times in a row, and is on a 2 minute cool down.

-Search for Tomorrow: Ultimate - Used only when Paragon is defeated. Doubles his stats; if HP is below 20%, restores HP up to 20%.

Paragon's Attacks and Abilities

-Concussive Bolt: Tank only attack. Targets one tank (either on paragon or trema) and deals magic damage to that tank. Ability to block and parry is reduced by 50%

-Decimate: Based on who/what is targeted by tunnel vision (next ability) this attack does 2 things. Magic Damage to targets, and resets a random cool down that has been used.

-Tunnel Vision: Paragon selects a role to target with Decimate. When he casts tunnel vision, all players effected will glow with the color that represents their role (healers = green, tanks = blue, DPS = red).

-Negate: Counters a magic attack directed at him. The countered spell turns into a ground based AoE attack centered around the player that cast it.

-Chaos Thorns: Chaos thorn is a "plume" based AoE attack that inflicts minimal damage, but does cause the status effect "Itchy". When players have the Itchy status effect, they can only move their character. Itchy lasts for 30 seconds. To remove the Itchy status effect, players must jump into the pool of Holy Water in the center of the arena.

-Genesis: Removes all negative status effects from Paragon and Trema, and removes all positive status effects to the raid.

-Extinguish all Hope: Centered around paragon, this AoE attack shoots out in a straight line in 8 directions (think Scylla in Syrcus Tower). All players hit by Extinguish all Hope are knocked back to the edge of the arena, and bound for 10 seconds. Hits for 10% maximum HP.

-Cruel Ultimatum: Ultimate - Used only after Trema is defeated. 2 players of each role (6 players total) are sacrificed (killed instantly, CAN be revived). All buffs from those players are transferred onto paragon. Loses all abilities. Gains an Auto-Attack with a high rate of combo (think Yiazmat from FFXII). A set amount of time passes, if he is not defeated, he casts...

-Big Bang: Game Over.