To be fair though, that time-stopping spell was a massive tactical game-breaker, especially in end-game when your epic-level mages can cast several in a row (trivializing any fight serious enough to use them), and only the two final bossess (main story and expansion) were immune. That makes it even more shocking though, and catches overconfident players totally off-guard.
True, in more recent games it has become an unpleasantly common feature, that defeats the point of badass special moves in the first place. Developpers should just split the difference and allow a lesser level of efficiency, like a guaranteed slow effect on bosses instead of all-or-nothing time stop. Much more balanced and rewarding.
Tricking the opponent into wasting their time stopping trump card is a good strategy, providing you are sure to survive the experience and be in good enough condition afterwards to win the day. A situation of imminent and major danger that leaves no choice but to use it for survival, especially if you can pull off several ones in quick succession, would be just perfect. Not only would their time stopping be depleted by then, but they would be stressed out and thrown totally out of heir game, thus much easier to get the upper hand on from there.