No Reddas before Omega?

I'm at the pharos and decided to go and do all the side quest while I had a guest character. I've done them all except "whos the strongest" "the seer" and "Yiazmat". (SPOILER)Now I can't do them With Reddas I think but is there any way that they can be done. I got the tounesol, excalibur, and Zodiac spear. I'm out of side quests (SPOILER)and this is the last chance for me to have a guest character to help with Omega any help would be great.

I don't think its possible. If memory serves me correct, doesn't Omega not even appear until after you beat Yiazmat? If that's the case, (SPOILER)you cannot cause you can't even access the two Mark hunts you mentioned until after the Pharos.

Sorry, I think your days of having a fourth party member are over...

Cries