u seriously need ehp man. getting at least 50k life with 350AR is essential unless u planning to play mp1-3 forever. there are some elites that would kill u even with ur gloom up, like copperfangs healthlink/reflect/molten, hulking phasebeasts molten/fast/vortex, tremors reflect/fast/horde/molten, in mp4 and above, just listing examples
and if u planning to play ubers, which is sorta the current end game (zzz we need new content lol) ur current ehp would get urself instantkilled unless u are doing ubers on mp1-3, which most people dun do cos their drops sux.
bottomline is, when ur ehp is low, u arent going anywhere (qoute from Burn Notice :p)