Summon Ujigami, 1E1S 8 gems, conj 5

Summon Kenzoku, 1s1e 9 gems, conj 6

Contact Jigami, 1N 10 gems, conj 4

Contact Mori-no-kami, 3N 21 gems, conj 5

Contact Yama-nokami, 4e 28 gems, conj 7

Summon Gozu Mezu, 3d 7 gems, conj 6
so how is Jomon now? does this significantly change/improve/expand the nation? What kind of strats do these offer them?