not only cactuars theres str bonus from Ifrit spr bonus from Siren Hp bonus of (I forgot that one :D ) 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)