I main scholar. P1 I let the whm handle all aoe healing. P2 rouse + whispering dawn is up for gigaflare then for every megaflare after that. I pop it as we stack so Eos can essentially handle all aoe heals post rage saving our whm a lot of mana. If you do aoe heal to top people off do it after the OT has secured aggro on the add.

Have your MT help stoneskin people who get 2 stacks during megaflare/rage combo.

To allow your scholar to dps more in P1 you'll need to stoneskin every flatten. Your scholar should also help with an adlo and lustrate as needed. Ideally you should be able to heal through the damage solo after that. Scholar will need to also help with Earthshaker. Know when your dps use CD such as manawall to dodge the damage as this is more potential dps uptime on the boss and you can further coordinate healing assignments to allow the scholar to spend that time in cleric stance.