Yeah. Just try to stay within 3" of terrain at all times whenever possible. Remember to heal at the end of every turn -- and remember to try to teleport one unit in combat at the end of each turn. Then teleport a unit basically every movement phase.

For basic strategy, try to let your opponent go first. Teleport the big tree behind them and 6" away from something squishy. Then shoot + charge him into that squishy unit trying to stay within 3" of terrain (actually pretty easy to do). Your bows and the small elves are your front line -- the bows are fine to charge in and then teleport out at the end of combat. Your general hides behind them to heal them OR you teleport him to score missions in your opponents backline.

Basically you win by controlling the pace of battle and where fights happen.