as the attack overide.... sequence references the projectile collection rather than the monster collection.... does any problem relate if this is left blank....?
if one does not learn from the failings of the past they are likely to suffer its return.
sometimes if you have the monster collection in the artifact and choose the correct sequence for the overide attack, then go back and change to the projectile collection, it will stay the correct monster sequence in game. sometimes it doesn't, but I personaly havnt had any problems when it did.