complete noob, need advice on which skill to take

Hey everyone, I’m playing the game casually and maining terra since ff6 is my fav. Need advice since after ranking up to gold, my win percentage is really bad. My question is :

1. what skil should I bring? I have all her skill and ace/fire RF (fire RF is +1, other no dupe). So far I bring melton, both of her UR, fire RF, and firaga, but firaga feels really hard to use since it’s short range, and I die a lot. other generic UR is minwu, but not sure if I should bring it, since I die really quickly if I teleport to the neutral/close to enemy crystal if the enemy know what they’re doing

2. how should I play the game as long range dps? So far I’m sneaking attack on other player here and there to steal their brave, but that cause my bravery meter to not sync with my teammate, and the enemy end up keep chasing me around and kill me.

Thanks for the advice in advance! looking forward to celes and locke to come out (maybe in a year or so) lol