There's a rhythm to healing just like DPS dancing and tank cooldown management. SCH should be aware of it by now, comfortable enough to quaff pots and throw DoTs.
It's worth it if everyone pushes DPS hard in the first two phases. 4 Bennu is a free win because it spares you 2 Flames of Rebirth, and things get really hairy after 10 stacks (not even counting the hard enrage).
