Thus far, I haven't entirely found a 'good spot to farm Spirit bloom. There's the entrance to the VoG (Vault of Glass) and the warzone area in the mall as I call it. The VoG isn't half bad as the enemies are higher level (Praetorians specifically) so you gain a SLIGHT bit more exp for kills, and there's a grip of caves, chests and SB here. In the mall, it's all about those circles. Doesn't matter where you start, there's an abundance of most everything here. One simply needs to constantly remind themselves they aren't here for kills (If this is so) and to keep farming those chests and SB. During the war, if you have 2 people DONT fight in the middle. Stand JUST outside a door and kill as many enemies as possible. The room will wind up looking like a loot cave after a few hours, but in a few minutes. Honestly, do this even more-so if you DONT have multiple people. If there's just one of you, I'd suggest the VERY first door on the left when you enter the mall. If you want a challenge, go to the right and take on the praetorians and harpies as they enter the battlefield.