Well my guild has been having problems with some bosses in FL. My guild is 2/7 and currently working on Rhyolith. Our only problem is that tonight we hit a wall. We can't seem to down Beth'tilac. Last week we got him after 20 attempts (yeah sad). Our group is composed of:
Dk tank
Prot. Pally
2 Rogues
SV hunter(just for this fight, rest is MM)
Afflic. warlock
Arcane Mage
Disc Priest
Resto Druid
Holy Pally
We push the boss every time to p2 with him at 80% or less but we can't seem to get pass 20% since the damage we are taking is burning our healer's mana. Everybody in the raid is above ILV 364 so I don't see what we are doing wrong. Everybody is pulling over 19k except for the rogues since they are on boss the whole time. Any advice would help and thank you in advanced.