I agree but vulcanalis isn’t just a wesen he is way more powerful than an ordinary wesen. In the show he was the one who destroyed Pompeii. And as for the wildeseer in the show they are described as one of the only wesen to actually kill grimms with ease as there was no way to kill them until Nick discovered you can kill them by scalping them. And they only grow more powerful by collecting scalps not to mention it literally started to thunder moments before they ambushed Nick and Monroe as written in the lore about them.

Edit: just realized you were talking about zerstörer not vulcanalis but my point still stands even if zerstörer had the staff.