You should start upgrading your weapons though, I think I had all of mine at LEAST to the second tier at that point, and several at the third. (Ultimate weapons aren’t likely until post-game.) I boosted Lighting’s speed sword, Hope’s MP Attack Boomerang, and I ended up boosting Fang’s counter spear. With Snow instead you should probably boost the weapon that does the most for the pargradims he usually uses.

Your crystarium is fine, those late missions sort of assume you have the stats from two or more additional levels. Don’t go into the characters’ “non-main” branches, the cost is simply too high for too little benefit during the main game.

Your team is fine. I used Fang instead of Snow because it gave me every crystarium while duplicating Medic/Commando/Ravenger, the three most used ones.