[Xietor]

I do not think it is a bug. Unless it is a new bug with 3.17. Before if you had a large titan or tartarian and gems and script it to cast returning, it will not do so if the ai thinks the attack is not threatening(and i think the ai measures this by hps etc).

So it DID used to be if you had a golem and 25 pd, it would not cast returning if a mage teleports in for a magic duel because the ai judges the mage no threat.

This is similar to scripting a mafe to cast fog warriors and there is 100 trolls in the army. a Wraithlord enters in artifact gear. kills your whole army. your mages never cast fog warriors. Why? it does not judge the single wraith lord a threat.

But you also do not want a foe to be able to make you waste your gems with a scout either, so that is the trade off.