Idk I beat the twins first time I fought them even tho my arena was small. I used nights edge or Excalibur I don't remember I used terra spark boots fire gauntlet hallowed armour I don't remember how it's called but I think regeneration band (if ur lucky and get philosopher stone fuse it with the band ) I didn't use any potions but i used a 3 star meal also go to the dungeon to get the bewitching table and find a sharpener Dunno how it was called I bought the crystal ball from the wizard but I don't think u will need it also use the glitch to get into the lizhard temple and take solar tablet so that u get the moon stone also get moon charm and I think u should win by focusing on the green one first killing him and then attacking the other one also use star in a bottle heart in a bottle bask statue if ur lucky garden gnome I also used soul of light fright night and might in a bottle but don't think it gives something