Apparently angelo cannon is much more likely to happen if you don't have wishing star. I think the challenge is probably about the same whether you use just invincible moon or both. (I mean wishing star does do 40,000 consistently, so it makes up for a small probability decrease of getting invincible moon) I've tried this quite a bit, (though what is kind of sad is that I didn't know Omega was always level 100 because I have a FFVIII PC guide and in the PC version he levels with you, I got him to the point that I would've beaten him, and he didn't die

) I think I might get a save with the invincible moon setup as well and try them both out. By the way, I don't think invincible moon happens half of the time. I do put everyone's hp to 1, (I was mostly working with a little lower level Zell (level 62 I think) though, maybe when I level him it will be better) plus put zombie, darkness and silence on everybody. (which unfortunately come off after the first invincible moon)