nothing should be getting to melee range but i do think i know what your talking about. is it the trick where you send the void in and when the mob pulls it just keeps on going.to that i suggest sending the void in and not doing anything until you know if theyll stay put that way you can keep slave on follow and just turn around and take a few steps to turn it around. casting dots, shadowbolts and frostbolts wont break follow so instead of keyboard turning just run a little half circle.

also id go fire mage it always seemed much better for quick kills especially at early levels to me. plus you shouldnt need the slow effect. not trying to tell you how to play just some things ive noticed in my experience. also i second the suggestion to use the keyclone PiP. its awesome.

and remember it wont be fast to level until you get all the kinks worked out. this is supposed to add a challenge. dont consider it like a cheat mode to fast progress or you probably will be dissappointed at first.