I use cleric as tank with a crap load of damage reflect ~250% and one ranger in front too with a ton of regen. then a ranger with high poison ~ 200 and a conjuror. level 15 right now and breezing through.
whoo hoo done with inferno with my last ball literally hanging underneath everything
on 23 turn the first block so it's long sides are pointing up, then place a ball and stack away
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