AI battlescript issue

Hi!!

I wanted to find the way to create a unique counter reaction from a monster who was precisely hit by chainsaw tool, but the battlescript makes you choose only the possibility to react at tool command(not what i want), if i try to make it react to item chainsaw, it won't happen anything.

Then i tested the bugged bio blaster tool spell, if you make it use to a monster you risk glitches or game freeze, but i put it only as spell reaction condition, then i used bio blaster tool on that monster and it reacted to it.

So i wonder if exists a way to make happen the same even for chainsaw tool/spell, the probem is that chainsaw it's not listed in the spells available...
Does someone know a solution?