It depends on the settings i guess, but in general, center is the key of this map. I suppose you have noticed the Bowler bonus huh? That is important as well .
I assume it is Game 13910371. First of all, those are horrible settings.
You have the Bowler, that's good. You want to keep two or three other stacks around the map and just take a 1 each turn for a card. Look at who's weak and who you can position near to make a kill, but don't forget it's trench. They're the extreme basics.