Here's one idea for a core build:
http://www.titancalc.com/TitanCalc.a...-6-12-0-0-12-0
basically, for attacking, follow up Study Prey with DW and DR. for running away, you have Monster Lure, Temporal Flux, and Trailblazing. DF, Herbal Remedy, and Find Cover give you some much-needed defense.
for extras on this build (and/or depending on your playstyle), you could get Nightmare for some added pet support, though it won't synergize with much. Maxing DW is another option if you have the energy for it. investing in Psionic Touch might be another good option since this particular build will likely rely on staff DPS quite a bit, with only 2 damage spells.
The only real tough part about this build, imho, is that your intelligence and energy will be pretty low in comparison to other caster builds. however, with good itemization and skill spending, I could definitely see this as a functioning, viable option.