Who is more difficult?

vs.

Yibb-Tstll is annoying, but Glakki is a badass. his abilities work too well together. Double successes against Yibb-Tstll is bad, but if you collect enough clues his modifier would be neglectible and he has no resistance/immunity. Glaaki, on the other hand, would keep spawning his children even in the final battle... outch. What say you?
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