Taking searing attacks means you can't reset Q on vaults which is the entire point of the Q build.
http://www.heroesnexus.com/talent-ca...BMFmBkBdHWKPAA
That's generally what I run but there's alot of room for changes. Siphoning at lvl 1 over cost-effective (no supps definitely), GK over frost shot, the other ult, or bolt at 20 are all doable for sure.