Thanks for the game. The key when your units are Angels is to use the smoke to try and manoeuvre yourself into a position where you're in the square next to an enemy unit and no-one is looking at you, thereby allowing you to attack. Of course, it's purely a matter of luck where the smoke will be on each of your turns, so if you can form a kind of ring aound the enemy that will maximise your chances of successfully taking an opportunity if and when it arises.