So I'm still leveling my NIN up through HW currently, and I was curious on something. I've never bothered getting Blood for Blood yet. I've played my NIN for a few months now after getting to 50 in a couple weeks. I just never bothered leveling Lancer to get the skill. I've played through all the older content, and all of the end game except for Coil (farmed CT, ST, WoD, and all EX Primals more times than I'd like to count). To date, my lack of Blood for Blood has never caused me any problems and no one has ever remarked upon it. My question is, now in HW, how absolutely necessary is it that I get the skill? Am I going to be a huge hindrance in the future if I don't get it?