User blog comment:Ozuar/Kha'Zix - My Conundrum/@comment-5514182-20130411033417

Here's my thoughts on it:

Evolve Q for dueling and assassination (Top and Jungle)

Evolve W for poke and AOE (Mid and Jungle)

Evolve E for mobility and initiation (Always evolve second IMO)

Evolve R for slipperyness and tankiness (Top and Mid)