This is the deck i'm using for now. It's very effective, althoughhe cannot overcome the opponent if he manages to survive too long.
My only doubt is about Skaven Clanrats. Should i play the Snotling wagon instead? he does a damage more but it doesn't have the clanrats ability, and he doesn't boost thanquol and snikcht. The rush concept would suggest the wagon but i'm not sure.
Personally I would play both the clan rats and the pump wagon. You would probably be better off removing some of your more expensive units for this (Urguk, Ugrok, or Iron Claw's Horde)
Probably is more straightforward adding some other fast rushy units, but i really fear shadow warriors and sniper decks. Some big units are more resilient and they're playable anyhow with we'z bigga. I should test btw, thanks for the comment.
Ugrok is probably my favorite unit in the whole game, but in my experiance even he is just too slow in a straight up orc rush deck.