Which Would You Find Scarier?

As some of you may have noticed, there is something of a trend in my fiction for animals with various skills and professions. In light of that, I’d like to know which you would find scarier:

Ninja rats
Raccoon wizards
Squirrel paladins
Owl assassins

Now, two of these four have already made appearances, and a third has been mentioned in passing. The remaining one might soon make an appearance too. Something that also sticks out to me is that the word order makes a big difference. Rat ninjas jus...