Quickcast dosn’t work with salamon, but it works with demon bats if you add the quickcast damage, to the cat buff and summon the warlock pillar that gives the dark damage attribute buff, you can ham on targets with 10 bats averaging 4-5k+ damage a bat. Quickcast also effects summon abilities while you are riding it, so lets say you pop quickcast jump on your apparition pop his AoE and you get a 50% damage bonus, however it only works with magical property skills. Other great combos is throwing down your pillar of agony, swapping things into it and if the dot lands while quickcast is active while it ticks it provides a 50% damage boost to each tick not to mention the base ticks from the pillar itself. Sleep is invaluable, once you kite the mobs to your desired location teleport lose aggro to your summon and sleep them hit them with your combo they explode instantly, i was doing this on the high 200 maps.
Wiz 3 is mainly preparation for rank 7 though that is when it truly shines and also provides a solid foundation for ranks 8 and 9. + magic missile is going to carry you to the early 200’s easily.
Lots of edits, i feel kind of vulnerable now putting out all of this information on my build but i hope it serves the greater good.