How, im trying to bet elixrs and my guys are around level 45 but i cant get him.

Offhand, I seem to remember that special attacks and magic are probably your best bet.

But you cant control them, and i finally beat the cactors but the harder guys are hard lol.

Equip a Sniper Sight and an Offering or Genji Glove. Should do it.

Also, Edgar's Drill will work if you get lucky enough to use it.

Setzer's Dice, no question.

Shadow throwing just about anything works.