The mechanic with the stacking is just broken. There was a reason why NG Enforcers Retroactive ability was changed in Beta Gwent. I'll give you an example with SK (haha) - imagine Svalblod priest stacks his pings and you hit them all in your last turn. Imagine having two of those last turn. Those cards are designed to tick once per turn for a reason and this is what chould be the standart of engines (ofcourse, cards like some of the dragons that have x amounts of pings on Orders is absolutely different thing).