Healers, not required. (EW SPOILERS)

[HappyHubris]

Mechanics in these duties seem far more forgiving than they once were. I remember back in coils if you were hit with one divebomb, or didn't run in an exact formation it meant instant-death.

I've done ilvl-synced coils.

Players are a LOT more experienced now. There are still instakill mechanics (e.g. Zod wrong spot turntable or diagonal push), but they kill fewer people. If you go back to the old content it's...not very taxing.