Okay, I got my feet wet on turn-based combat. In particular, I was able to experience high-level turn-based combat, because I found you can switch combat mode in-game through console command "SetTacticalMode RoundBased." So I fired up a level 20 save and went at it for a bit. In so doing, the major lesson I got regarding stuns is that casting stuns are unreliable - or at least inconvenient - for someone who doesn't like to micro-manage too much for me. Non-cast stuns, however, are amazing. For instance, Monk Stunning Surge proved golden, because it coupled stuns with damage. Chanter Phrases were also useful, though they do not have the damage dimension.
So my question now is: What other good class stuns are available that are non-casts beside Stunning Surge and Chanter Phrases?