Neles wrote:What is the penalty for that?
In the arena you have -2 max res. For every 1.5k hp above 17k (or 16.5k, not sure) you get an additional -1 max res. There is no flat resistance penalty. Reaching 50% physical res is recommended, as in the 2nd phase desolation might otherwise kill you even if you have all buffs collected. Poison hits hard in this fight and avoid helps a lot against it, but if you don't have avoid you might have to get more max poison res and/or life.