While I agree that Rugnor is great and I'd love to have a copy of him, I think you're still more likely to pull him than Pyxniel. We still even haven't seen what Pyxniel is really capable of in the first place. 

This would all come down to what your resources would allow. If you got enough to finish the fusion, then I really think you should; but if resources are quite low, only going for Rugnor wouldn't be so bad either.

You are collector :)

I agree that if your goal is to collect all champions in the game, getting legendary is better.

For me the question is what champion will help me more. Rugnor looks like a champ that can push me through some Doom Tower boss stages. And I finished High Elf faction wars (it's not about faction wars only, it's about single faction secret room and challenge rules too).

I will watch videos on Pyxniel and epics before making final decision, of course.

My doubts are similar to Fayne+Kaiden vs Vergumkaar. I still don't know if it was right to keep 4 epics.

I'm still wondering about this as well

I am so torn

same, i kept the 4 epics last time.  only really using fayne (but great for cb). probably will use kaden in fw.  is that lego good for doom, dont even remember name?