Dokos

We've tried several things for felmyst and settled for...

3 ranged groups behind him with 5 people stacked right on top of eachother.
2 melee groups on each leg.

groups: ranged ranged ranged holy priest shaman

If encapsulate hits a healer in the ranged group, all the adjacent groups heal that person with coh/chain heal. The other healer stand there and heals himself (even if he's a MT healer, felmyst doesn't melee while encapsulating).
DPS just moves, pops a healshtone / hp pot if needed. The only requirement for this to work is people remembering who is in their groups so as soon as felmyst turns and targets someone they know to move immediately.

Bringing 6 priests, 3 shadow, 3 holy or any combo that allows your priest to keep their global cooldown clear for MD's makes this fight SO much easier. Your groups will be constantly topped off and the MD's will fall right on time.

If you are really having trouble with MD's landing on time.... as a temporary solution priests can always spec focused power. You can still get all the aoe healing talents except for CoH and just use renew on phase 2.

Phase 2 is just having enough brains to realize that standing at 90 degrees of where the 2 lasers landed is the safest spot to be in.