As other's have already mentioned it has been a difficult climb for me as well. I believe this is due to the casual player base dropping out which leaves only the hardcore/dedicated players saturating the ladder thus increasing the competition. This always happens towards the last month of the expansion and right before the new expansion hits.

I was stuck at 10 for the past week (highest I got was R6 2 stars) until I saw that the bot hit R5 this morning. I honestly believe it has more to do with getting lucky with win streaks than anything else. However, I did make changes of my own:

1) I tweaked the decklist to make it much more aggressive (being able to close out games as fast as turn 6) by adding x2 Acherus Veteran's, 2x Bloodfury Potion's and 2x Crystalweaver's. I cut the Bloodsail Corsairs, Tar Creepers and Abyssal Enforcer mainly because they just aren't that great with the current meta flavor. By that I mean there's a huge amount of Big Druid's on ladder and stats wise Druid has been my worst matchup. The plan is to hit hard and fast as early as possible before they play Spreading Plague, and Corsairs and Creepers dont fit into that plan. Also Enforcer is really slow I haven't seen a lot of Shamans so it made sense to take it out.

2) I tried Scott's config but then I realized it was written to mulligan hard for Keleseth. I went back to using BotWhat's 1.1 Zoo config but tweaked the mulligan config so that it keeps all 1 drops and keleseth against all classes. My winrate went from 38~42% to 49~51%. Please do not misunderstand me as I am in no way discrediting Scott nor his work. The numerous results that people have gotten from his config is a testament to the fact that it works. I just happen to experiment on my own so don't get me wrong =).

I will upload a screenshot and the mulligan config that got me to 5 later tonight (at work right now).

link for download is not zoolock.

Well you have to be a lucky cunt to hit 5 with this AI. It's clear that's bad and will remain so

I hit 5 this month and last, and that means I've hit 5 100% of the times I've tried. You likely won't get there on the AI alone, though, you'll also need a proven deck. Like the Zoolock deck in this thread. And time. Don't expect to beat an expert player, and really you shouldn't ever be able to with a bot.

I'm using warlock, if you guys can have a decent winrate with an AI that attacks with councilman first and plays minions after I guess you're happy :) Even if I try to farm late in the night, I can't get noobs that get crushed by such powerful plays :)

link?

Well you have to be a lucky cunt to hit 5 with this AI. It's clear that's bad and will remain so