For example, the Bard's Distraction Talent causes the enemy to forget his target and wander off somewhere... I set up a tactic with 'Morrigan: Being attacked' as the qualifier, then the activation of Distraction as the action. The expectation was that my rogue would use Distraction on the enemy attacking Morrigan, but it actually just caused him to sit there and not do anything. The problem was that since I used Morrigan as the object (and not Enemy: attacking Morrigan), he got hung up on using Distraction on an ineligible target (Morrigan) and subsequently did nothing at all.

What I would suggest is saving before a battle that can create multiple situations, use hold position on your other two party members, then controlling one to watch how your other character reacts with your tactics. You should be able to determine which ones behave properly and which ones don't.