not only cactuars theres str bonus from Ifrit spr bonus from Siren Hp bonus of (I forgot that one) and others now with Str junction and bonus attached you can reach 255 str before the end of disc 2 then keep someone useful (spoilers ) To lead the second team in Ultimecia's castle I usually pick Zell for this or Quistis at a low level then swap the junction to them and train them up until they too will have 255 str perform as necessarry (once you equip 2 GF to each character at level 100 with all skills learnt you can play around deleting useless skills - Draw, gf hp +10% ect from them then teach them good skills useful skills to keep the str up there with str junction)