This was one of the more interesting games I've played in awhile. Kingdom shown below.
http://dom.retrobox.eu/?/20131206/log.50ea2963e4b0429cfe091cec.1386365416670.txtHaven, Develop, Watchtower, Rats, Count, Festival, Harvest, Merchant Guild, Royal Seal, Altar
So my first thought on this kingdom is engine. Specifically a Festival draw up to 6 engine with Watchtower. Merchant guild provides some cash and scales nicely with the +Buy. Altar provides trashing and gaining of $5-cost cards however Altar is horrendously slow for trashing and there isn't a great way to get draw without first trashing down.
The alternative approach is to utilize Rats! It has a few unique interactions here which make for an interesting game. First is the Devlop/Rats combo. This allows for the top-decking of a Festival/Watchtower which can be used for next turn or alternatively used to set up the following hand. In addition to getting those on top, for trashing Rats you get an extra card in hand.
The other interesting interaction is with Watchtower. I don't think I've ever encountered this on the forum before so I'll lay it out explicitly. Rats becomes an entirely new card with Watchtower in hand.
Rat King
+2 Cards
+1 Action
Trash a card from your hand other than a Rats or reveal a hand of all Rats
By using Watchtower's reveal to trash the incoming Rats, you transform your lowly rat into a king that is a Laboratory that trashes. It also prevents a serious issue of Rats completely infesting your deck.
I decided to go this route and it worked out very well. I start out getting Develop, Watchtower, Rats and a couple Havens from Devoping Shelters. Then check out Turns 7 and 8. I am able to pick up the last 2 Festivals only losing the split 6 to 4 and having a much more trim deck.
I am then able to finagle a 3-pile ending on turn 11. All in all, a pretty cool game featuring a combo with 2 of the least loved cards in the game.