Hearthpwn

I'd suggest a second Doomerang instead of Evasion, because if you get SMOrced fast at the beginning, you are going to lose anyways, and in control matchups you don't really need it, just use Saps and Vanishes properly (for example against jade druid). Doomerang is a nice way to keep your weapon going - you don't have to worry about your weapon durability much if you manage not to draw Cavern Shinyfinder.

Is there any point to add envenom weapon to this deck?

3-5 Dmg is enough to clear most minion