I've done T13 quite a few times now ^^
As a SCH
P1 you will DPS most of it if the WHM can handle the majority of this phase.
-Pick a side to heal for earthshakers,
-Adlo for flattens,
-Succor for megaflares
P1-P2 transition
-Virus as mr ^ said
-Succor and bubble
P2
- Some grps like to split healers between MT and OT at this point so if so heal your target
-Around the time the add dies, bahamut should be doing a few more auto attacks and then you will have flatten -flare so just adlo once you get used to the timing.
-Keep an eye on targets for orbs casts can safely take 2 orbs, 3 = death for non tanks, melees with 2 need an adlo/stoneskin usually to be safe
Treat this megaflare the same as before
-Keep an eye out for towers and hp bars around this time,
-Throw up DOTs when you feel comfortable with this phase.
-Gigaflare at end of this phase Virus, Succor, Bubble
P3 DBs
-Handle positions as discussed with party
-Megaflare with DBs that hit after twin dives so succor helps again. Cast when red marker appears and get ready to run after.
-WHM should be able to heal this phase alone keep an eye on the target of the pain as it can hit hard at times but you can usually safely DPS this phase.
Succor for Sins evil eye, and again for megaflare dives
DBs
Again DPS if WHM is comfortable, watch out for death sentence. When you bane the gusts, give the tank a second to grab aggro otherwise you pull them and potentially have twin plummet the party.
When the pain does his tail whip get ready to stack succor for megaflare.
Succor and bubble for terra
Tanks should share damage without mega buffs for 1st akhmorn so either split tanks between healers. I usually solo heal this party if WHM so discuss with your WHM
It is generally rinse and repeat of previous phases now,
The only difference I would say is to pay attention to tethers on earthshakers, gigaflare will happen again after a full rotation of mega, earthshakers, akhmorns cant remember exact order; at work atm.
Because there is quite a bit of time between AOE damage to the party, medica 2 and fairy heals usually take care of it so you can focus on big hits for tanks and dpsing.
Good luck![]()