Tactician mode isn't really a "Any comp" mode. If you're looking for that, play Classic. If you're looking for very hilarious build, play Explorer.
And those are the steps. I don't understand why you're trying to play Tactician with no ranger. The #1 rule to any turn-based game when it comes to higher difficulty mode is to "Always focus fire". You don't get any good knives until you kill Griffs and later, Knilles so don't expect rogue to deal crazy damage unless you steal for some store-leveled knives.
