seems like a decent build. i usually go rancor, vamp, hot pursuit, rain, frost, execute, and frenzy. the dps is incredible. i will have to try this out though, looks fun

You are definately right that auto-attack build has it downsides too. Especially at the beginning of the match, where you can only try to get as much experiece as you can but you have to run for others heroes until later in the game when you are a power house.

However Illidan never has been much as a problem for me as of yet. Nova is more a pain though.

I will try this build, as I like using different builds and Valla being my favourite hero by far.

Yeah right , you need practice a lot with this build, in phase line only use W or Q if u want kill, when its phase grupe try to recall before the fight or get the source , with your combo probably you can kill 1 or 2 , and rest of fight just only basic atacks. with the combo you'll stay low mana , but you've killed one or two champions as well you 've done .
If you win the fight probably you will stay low or out of mana, then you shouldn't overextend like a noob, take the objectives and recall.

With this build i go 34 wins / 12 loses with valla, i think its really good.
But the bad of your build is that illidan can rape you easy , with my build I can destroy his little ***.

You never talked about mana. My main build is auto attack build and there I often find myself short of mana. With your playstyle you'll lack mana everytime you do Q + E + Q + E + Q.