Your biggest worry, as stated, is probably pull my finger. So make mosquitos a priority target. Also, you can't rely on terrifying since pigcharge ignores it and that is the gremlins best melee attack.
Don't hang back. The more breathing room you give gremlins the more they can proliferate and generate control cards. If you get stuck in quick you can press the advantage since they start with one card less and you have more intrinsic protection with harmless. Also, if pandora can hit quick she can bounce around the board at liberty locking down the biggest threats.