Magus' Magic is still impressive in that he seemingly had to overcome a lot in order to use it at all...whereas Crono & Co. had their Magic unlocked by a God (? I forget if that was 'bunked as a Woosley or the other way around, but still...! God or not, Spekkio is still a mighty, outside force) because they learned how to walk and turn right (holy crap, Spekkio turned them into runway models!!) and, again, boss battles Magus didn't have to help him level early on in his Magical endeavors (as far as we know, anyway)...
As for Team Omega Flare's "problem"...What's so effective about wasting two characters' turns (turns that could go into attacking with single techs or a good attacking double tech) instead of just one? And I'm never down enough to need 999 healing for the whole team anyways. Heal Beam saves your butt when you need it, and although it won't bring you up to perfection, it'll still leave you with enough to survive after those rare Hallation attacks...Granted Robo's slow, but the Speed stat is the easiest to compensate for...I personally don't go for a team based on Triple Techs, though, especially since the single targeting ones with Ayla do the most damage (I think that's right anyway)...but my team is Omega Flare when Crono is elsewhere....(or when I feel like hearing Magus quotes...!)...