both sides have a good point but in my opinion the stave crasher won't matter much since as emir said they can copy acid demonstration but if they are fighting a class that uses pneuma or has auto pneuma it won't matter either way. I think the stave crasher won't be too much of an issue but don't have it give +15% stave crasher damage since it is baised on the matk of the stalker anyway and you're not trying to make the weapon OP as all hell.