Wow. Thanks a lot, Al-ex! That helped. At least a little… There are many quirks to this. 🙂
I followed your suggestion and it worked better, but it was still not quite reliable. I then added a Black Magic/Mouse Reset as the first element in my deadly strike, and now it seems to work properly. I’ll test it a little more.
By the way, I published my design to Might And Magic: World of Xeen here, if anyone is interested.