hunter minion deck gets the best win rate although its still not great in ranked. im up to 150 wins in ranked with about a 30% win ratio in ranked.
As i stated in another thread, you're better off farming your gold in casual... And ranking yourself. In casual : about 50% winrate easy : so it takes you 60 games to get your 30 win => 10 hours botting in rank : about 20-30% winrate : 100 games minimum to get your 30 win => more than 16 hours of botting and a pretty good chance to fall down the ladder. So : botting in rank = pointless.