Jaguar-Oshi is an absolute must. It can give +mp, +avoid, -damage taken, +damage, or +crit. When max, this is a GREAT buff.
Jaguar Roar is effective because it's a short, low attacking move, while Ricochet the mob to be raised up, and not right on the character (it will activate, but not hit the mob). Roar will hit mobs that are very close and low to the ground, and stuns/kbs them.
Mines will be upgraded to 13, but no more. It's pretty useless in the long run, but I do still use it at Water Goblins since it 1 hits them.