I noticed when I was playing, that the graphic for a mana node when your religion is the Runes of Kilmorph makes it hard to see units on the same tile. Maybe it could be edited to make it easier to see units.

I have attached a picture that has most of the mana node graphics in it. The one for the Runes of Kilmorph is in the upper left.

Theses seem stangely familiar :)
Actually the kilmorph on is the one i did not like at very much from the beginning, but i had not time to do a different one then. It was envisioned as a kind of forge where mana if forged into spells. Maybe i will redo the graphic in the furute but it is rather low on my list.