I don't think the bots/npc are casting invul - my pet is able to hit them, the berserker can hit them. it seems to be the warrior and wizard that this happens to when they are meleeing.
Bots were equipped using Georges' Item Editor - which i don't think checks for level when equipping an item.
it could be a level thing as the bots are 52 and the weaps are for 65, and 75. I never thought about a weapon above its level.
i'll try lower lvl weaps and post back.
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