I think it is a little quicker than fighting the RGs and you don't have to dodge anything. You can run in and out of the screen real quick. It does take a couple of seconds each time for the Snow Beasts to enter the screen, etc. However, the good thing is that if you get Crono's magic stat high enough, you can kill both of them in one turn. And you get 9,000 XP per battle I think. That's more than one whole trip down the Geno Dome belt. Unfortunately, there is no easy way to save. The best way is to run all the way back to the beginning of the DV and save, or proceed a little farther, but then, of course, you have to go all the way back through the DV. Anyway, it's not too, too bad. I mean, I think you need around 1.7 million XP to get to level **. And usually, you'll probably be around level 40-50 before going into the DVs, so that means you need about an additional 1.3 million XP. At 9,000 XP a pop, that's about 144 battles. Not too, too bad. I think it's probably the quickest way, actually. If anyone has a better way, please share.