they arent really considered combat units:
Could the Geomancer be used as a combat unit? Livestream - 2:28:10
New“Yea, I can see how it could be useful as a combat unit. [The
geomancer] could cause a split in the earth in front of a group of
potential invaders. Will she have combat spells? Probably not, the
spirit behind her is that she is boost to your domestic side. She
crafts golems to boost your productivity and she helps clear earth
much more quickly then you could without her. She is not designed to
be a combat unit but you can imagine her as a support unit helping
with defense.”