This never changes for any of the fights

10-12 man: 2 tanks, 2 healers, 6-8 dps
13-17 man: 2 tanks, 3 healers, 8-12 dps
18-22 man: 2 tanks, 4 healers, 12-16 dps
23-25 man: 2 tanks, 5 healers, 16-18 dps
euwowgold
This never changes for any of the fights. I try to follow the rule 1 healer per 5 players. The only time there are exceptions are for those 13, 18, and 23 man raids. If I have healers that are good, maybe slightly overgeared, or they are in my guild then I may only bring 2 healers for 13 man, 3 healers for 18 man, and 4 healers for 23 man. I have never had any issues when I follow that. There is never any need for 3 tanks.

Norushen used to give me troubles but after I figured out the order to send people into the test realms it doesn't take more than 2...maybe 3 attempts. I follow the same order as I do in 10 man normal if there are two orbs. Once we have enough people and there are three orbs my order changes.