what i do with my barb is...

a few ways
you want to have atleast 100% r/w for jumping them when they get close
B ---- B ---- B
/ ```````` \
B-------S ----- B
\ ```````` /
B ---- B ---- B
..thats the battle plan strafe them until they start teleporting around you..
the average to smart sorc will try to get about a screen and a half away from you so that her orbs will hit you
what you have to do is run around her and ww right into the area you think she is going to be at
i also reccomend taking off your shield if you have maxed lit/fire resists without it so that you deal more damage
more damage=she run out of mana quicker because of energy shield
the first hit you get in which drains all a sorcs mana will usually keep her standing waiting for the mana to regenerate
you can implement bezerk into this but you have to becareful, and make sure your'e not just chasing her ..taking all the orbs she throws out and if the sorc is hydra you have to zig-zag
to avoid hydra but closer to her and if you can't linearly get closer strafe her until she teleports to an exploitable area