Everything Triumph said except use lvl 1 spells except the ones that are higher lvl yet have the same cooldown that way you can continually cast without having to wait for a cooldown (well at least lightning bolt for me) being the only high lvled spell I used and everything else was lvl 1. Don't always do kqs. Get used to your class and know its specialties and limitations. Kqing may seem like a quick way to lvl and it is in the beginning but knowing your class is more important in the later lvls. Buildwise I would recommend the 25 spr rest in int but that is just me. I like big flashy numbers
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