What level for Reha Arena of Death?

[Zechnophobe]

Arena of death were two almost identical combats for my Paladin. First turn target my bone dragons. They wait until end of turn when all bad guys are around them, and then use their poison AoE attack. Bam, massive damage to 6 stacks. Turn two I time back the dragons at the beginning of the turn (Back to same spot they started in... in the middle of most enemy stacks) and poison blast again.

Whooped on them something fierce. Do it a little different against brontor/tirex army though. Tactics is a huge help in setting something like this up.