Since making that post I've learned that the numbers I listed there were actually only the minimum damage per hit for the mobs, and that all mobs have a damage range. Apparently the way it works is that there is a base damage for all mobs of the same level, and then individual mobs get modifiers to the base damage and spread. So, for example, the base damage for lvl 63 mobs pre-patch was 113k, but the heavy hitting mobs such as phase beasts have a 1.5x modifier and 0.5x spread modifier so they hit for 170-226k. This information is taken from a post found here: http://www.reddit.co..._36_mlvl_63_44/
Therefore, my original post was inaccurate in that the numbers I provided were for the minimum damage of the mobs and did not take into account their damage spread.
However, now we know the base damage for lvl 63 mobs to be 63,615 after the patch 1.0.3 nerf. Therefore, phasebeasts and the other hardest hitting mobs (besides the avoidable melee attacks like mallet lords and the big skeleton axe windup hit) will now have a damage range of 95,423 - 127,230. Given that topend damage of 127k, you now need just over 94k EHP in order to always get a full 35% resist out of force armor.
This does not include any additional modifier that probably exists for champions/elites though. I am trying to find out what that modifier is and when I do I'll update this post with it.
EDIT: Based on this post: http://www.reddit.co...2qfvn?context=3 there is a report that champion/elite mobs do 25% more damage than their normal counterparts. I will try to confirm this in-game. If anybody else has any data on that, it would be great. If that is the case, you would need 117.5k EHP to get a full resist from an elite phasebeast / similarly hard hitting mob.
Edited by Morphos, 19 June 2012 - 09:34 PM.