OK this is gonna be kinda lengthy, so bear with me. This is the strategy write-up I had originally done for this fight, using information from
the Wiki page for Temenos C-4 and personal experience.
Proto-Ultima is a much stronger version of Ultima from the CoP Chapter 6-4 fight. The boss has five stages, based on the lowest percentage of health reached.
This is important to remember, since if you wipe at any point and the boss regens, it will keep any abilities it has gained from reaching a new stage. The Stages, with Spells and Abilities:
Stage 1:
Antimatter - Ranged targeted Light damage (ignores shadows)
Wire Cutter - Targeted physical damage (absorbed by two shadows)
Chemical Bomb - Cone Attack Slow II + Elegy ** MUST BE DOUBLE ERASED ASAP!
Stage 2: All Stage 1 Abilities plus...
Dissipation - Used at 79% Health, 20' AOE Dispelga ALL buffs, terror and hate reset. ** MUST BE STUNNED!
Nuclear Waste - 15' AOE Elemental Debuff, Used in combination with a single element cone attack + matching enfeeb
(Water = 40/tic poison, Stone = petrify, etc, Wind = silence, Fire = plague, Ice = paralyze, Lightning = stun)
Stage 3: Dissipation at 59%, Antimatter, & Nuclear Waste plus...
Equalizer - 10' AOE damage, absorbed by shadows
Holy II - Targeted Light damage, used after each TP attack, Target is RANDOM (blocked by one shadow)
Stage 4: Dissipation at 39%, Antimatter, Equalizer, Holy II plus..
Energy Screen - Invincible for 1 min (in other words, nuke it)
Mana Screen - Full Magic Shield for 1 min (in other words, melee it)
Armor Buster - 20' AOE Light Damage and Gravity (ignores shadows). ** TRY TO STUN THIS and ERASE GRAVITY ASAP
Stage 5: Dissipation at 19%, Armor Buster, Mana Screen, Energy Screen, Holy II plus..
Citadel Buster : 30 Second Countdown with draw-in, then 30' AOE Massive Light Damage and Hate Reset, ignores shadows.
What to know about Citadel Buster:
- Draw-In will only grab the one person who holds the most hate. Usually this will be your tank, but it could be someone else.
Chances are about 90% if you get drawn in you will die, so just accept your fate, do as much damage as you can, and make sure your RR is up!
- If you're a tank for this fight,
BRING A LIGHT AND MAGIC DEFENSE GEARSET. It will help immensely throughout the whole fight, not just to limit damage from CB! Light Carol also works well, so have a Bard or two handy. And make sure your WHMs have Shellra V fully merited and up at all times.
- When you see the countdown, do not run out immediately. You can make it out of the room if you start running before you see 15.. If you're a melee and Energy Screen is up, or a mage and Mana Screen is up, go ahead and run. It is very important to keep doing damage during the countdown!
- If you're out of the room you won't get hit or drawn in. After the countdown, have the main/backup tank and blink melees go in first, then the mages can join them.
-
You can Stun it, but your timing has to be absolutely PERFECT. I've never seen it done successfully.
- If at all possible, zerg it fast and hard under 20%. The more damage you do, the less people will die from CB.
What to know about Ultima in general:
- Blind, Slow, Paralyze, Elegy, Stun, Gravity and Threnody will land, but he will gain resistance fast.
- Elemental DOTs will land most of the time. Have a BLM with a full-INT build (120+ if possible) handle these - go with the Burn/Choke/Shock wheel.
- Bio and Poison stick, but Dia and Requiem will be resisted.
- Dissipation
must be stunned every time. I really can't stress this enough.
- With each stage his attack speed will increase.
Optimal Alliance Setup (yours may vary):
Tank Party - PLD/NIN, PLD/NIN, NIN/WAR, WHM, RDM/DRK, BRD
Mage Party - BLM x4, RDM/DRK, BRD or COR
Melee Party - RDM/DRK, BRD, 4 heavily-geared DDs