I use a Trap Rat with rainbow damage (Qor dagger/Shadowhymn SU shield) and Rain of Fire on switch for everything. There are no item swaps except for Beacon buff.
I'd be interested to know if anybody has made a similar char and beat Yshari with it in one go.
Theories don't count, you must have completed Yshari Sanctum with that char.
There are also some videos (not made by me!):
Fire/Cold sorc
Tantrum pala
Melee sorc