Re. the Hildibrand plot and 'summoning' Enkidu... I haven't played past the ARR stories (so may be missing later information) but have to wonder - was it really just Gilgamesh's wish that was enough to trigger it? Or is that chicken smarter than it's letting on, and able to summon Enkidu the same way Shiva is summoned? You don't see it while primal-Enkidu is there, but it reappears afterwards...

(Maybe you don't need so many crystals when you're working with a smaller host. Or it was just a really weak primal as a result.)