note this is not a scroll/item guild
first realist that epics are very different from normal quest epic creatures have these qualities
they are resistant to
charm(shortened length)
most stuns(shortened length)
anything with a save(high saves)
stat damage(90% its useless here)
negative levels (regenerate quick)
All epic creatures(including summons) are immune to the following
Anything that kills them outright(such as finger of death)
The spell mind fog(a spell wizards/sorcs get)
poison and disease
But as of update 5 any non named epic monster has a -10 penalty to all saves wider damage rolls.
As of update 9 all drow elfs get spell resistance equal to 10+level(epic drow now have around 46 spell resistance)
They also have high hp and do good damage(around 40-80 damage on the trash) and the casters have maximize empower and heighten on all there spells.
How do i beat them if there that powerful?
tactics such as
mass hold(a caster uses mass hold monster on all the mobs that melees hack away)
wall and caster holding Argo(melees make a wall to prevent things from getting to the casters that are using fire wall or similar)
and a few normal tactics.
now most epic has a 'cheat' that allows easier completion i will list them
tharak arena
the big top
not ready yet will finish later