Help Me Kit Out Jomon

[Stryke11]

Ok, so:

Nature sign = Reinvig?
Earth Sign = ? (from description it insta kills)
Water Sign = PotS?
Air Sign = ?
Fire Sign = ?

Sorry if I appear dense, but what is the benefit of making an Omnioyji your prophet? Access to the signs I gather but even with PotS and Reinvig they still seem a little weak - Astral mages aren't great for Jomon.

I haven't had a Nushi yet because there are only 3 swamp provinces (out of like 200) and I'm nowhere near them yet.

I have been sending out Shuras, and also pairs of Ujigami's and Kenzuko's based on the suggestion of having the Uji bless the Ken, I have a rainbow mage so all they get is some morale and 20% air shield, but still it's fun and feels like a strategy.