I have no idea how difficult it would be, but is it possible to make all "War Beasts" count as "Monstrous" for the purposes of skills?

If so, what kind of options are there? Would each individual unit need to be changed by hand? Or would there be a way to cover it as a blanket and thus also apply to any future modded units?

I know nothing about how modding this game works, I just got frustrated by Rakarth's skills, even when modded, only being applicable to the Giant Wolves you get directly from his Monster Pen (even if you use mods to spawn in or recruit Giant Wolves some other way, they will not count). It doesn't seem like a mod exists to address this yet.