I'm lvl 45 and i see that i can go kill the goblin's rabbits in Cape Terrigan.
But IF i don't have NIN as a subjob, am i basicly screwed?
Is it possible to go there as a 45BLM/22WHM and just bind the rabbits then nuke?
Honestly, the only way that I could see this being consistently safe is if you can 2-shot the rabbit. If you absolutely cannot sub NIN, my recommendation would be Blizzard II > Sleep (Bind is extremely unreliable compared to Sleep) > Waterga II. Even if this doesn't kill the pet, I'm sure you can finish him off with a tier 1 nuke in between his swings when he wakes up.
Still, this method requires an extremely larger amount of MP use due to the fact that it is almost mandatory to Blink/Stoneskin between every fight, as well as the extra Sleep AND the inefficient use of an -aga spell. Granted, /WHM will give you a boost in MP, but not nearly enough to outweigh the benefits of Utsusemi. If you're a taru, this may not even be a problem. However, there is also more risk involved in this method due to the fact that you absolutely must sleep the enemy every kill. Before level 51 this may be difficult to do.
Just level /NIN. It has so many uses for so many jobs. :)