I'm up for helping out with it tomorrow sometime.
I put all my points into towers so 1 lightning+1magic missile at each of the spawning point keeps them at bay all 10 rounds.
Then you only have to worry about flying guys, and a missile tower or two at each tree when placing presents takes care of that.
(First couple rounds you don't have enough points to place enough to block all, but they come slowly enough then that it isn't a problem.)
--
C _ _ H _ _ E _ _ S _ _ T _ _ E _ _ R _ _ _
http://img.imgcake.com/chestaga1gifun.gif \ http://bbg-games.com \ http://twitter.com/BennFried