He's okay early/mid, but Trance keeps getting better as the game goes on. I was in a game where we were sorta stomping a Troll team around, then lost one teamfight at the 40-min mark and they simply waltzed in, took t3 tower, both barracks and one of the innermost towers in like 15 seconds.
Also people never seem to use the ranged attack so just pick Drow/Viper and laugh at them.