Strategies are as follows (from what I've been told)
Taoist : get L7 skeles (or shin n skele highest level you can) - Poison Everything then just keep SFBing and keeping pets alive (Spirit drugs can be used for extra damage)
Assassin : this you need to be bloomin quick, you get a decent DC Gear, 3 impact drugs (I had drings/dbl blades/dgs/2-4neckie) for my DC Kit and you just need to work tactically - clear out pre fence area, work round following the wall right as then you will finish at the chest with the remainder mobs - make sure to flash dash the target you are hitting too.
Warrior : group up and Half moon (impact drugs may be required also)
Wizards : Lightning and Tstorm - done
Archer:I'd assume Static Shock everything to oblivion but not heard any archer issues been talked about