MOM or Auras for Ancestral Warchief Hiero?

I'm playing an Ancestral Warchief Hierophant in Essence. Level 65 and the build has been solid so far. Went life/armour for defenses, it's been mostly fine (a few deaths but, hey, softcore). Here's my current skill tree:

Passive skill tree build

I'm not sure where to head next on the tree. I have about 850 mana and my totems only cost about 15. I've thought about getting Divine Guidance and MOM for more EHP or getting some aura nodes and just reserving most of my mana. I'm also thinking about dropping the three life leech nodes. They don't seem to make a huge difference, given that 75% of my DPS comes from totems. Finally, I'm debating between getting more life and armour or speccing into some energy shield as well.

If anyone has experience with this build, I'd appreciate any advice, either on the topics listed or any other improvements I could make to my skill tree.