Is Herc (with regards to soul weapon) the best soul for Wind? For context I'm running Azazel, Gaia, Oberon, and Iblis. I have enough to buy a soul weapon and wondering if I should just buy the herc one or hold off for now.

Also, do stock for regalia reset every month, or is the increased conversion rate static (5 fragments = 1 regalia for 20, then 10 fragments). Also, anyone know when/what the holy soul weapons are and when they're coming out? Really want to use Shingen for my water comp, but if the holy soul weapons aren't coming out for months I might just grab the ones for Herc for now.