Serpent's Blessing

[Psycho]

I didn't describe it, Jazzepi did.

I had a similar thing, though. My Pan scripted to cast mass protection refuses to so, because the opponent is not enough of a threat. Instead he casts wooden warriors which doesn't require gems and does so several times. On third or fourth casting he uses up the gem he had for reducing fatigue. The effect is that the gem is still used up, but not all maenads are affected by barkskin.

[WraithLord]

Well Jazzepi and Psycho. Now I understand your point better.
Its not just that the AI overrides your script, its that AI chooses to do so for a clearly inferior alternative. This is very distinct from the returning issue ano has described in his thread. Since in the returning case its arguable whether the AIs decision to override is inferior or not (depending on situation). However choosing to cast a limited version of scripted spell (effect units instead global) is clearly wrong esp. if the limited version costs the same amount of gems as the global.

I can only hope devs will be aware of this and maybe, hopefully provide a fix.

[Edi]

Run a debug log and examine the spell prioritization process on why it casts the wrong spell. It gives an evaluation on what to cast and that may give you some clues.