Mantra and Bard

[Alcyon1]

If you want to kill twintania your 5th cross class needs to be feint. 20% slow on a dreadknight the instant it drops can save someone far more definitely than 5% healing in a small radius AoE can. Have your offtank paladin (if your offtank is a war he should go pally for T5) sit next to where the Dreadknights drop and when he uses his first stun open with feint. That's 10 seconds of pally stuns (3 in a row) and 20% slow off the bat. From there your casters can stack on their 40% slows for guaranteed kills.

PS: Mantra is worthless... There is no fight that you should ever be taking large AoE damage and be stacked on melee. Not even T4 since that enrage should never be hit anyway.

And the knight focus you and you die.