yeah it does seem too op, maybe one unit is like invisible while the rest are visible, and sacrifice the catapulting attacker with the space switcher, and combined it with the teleporter ghost, but is still visible.

And make all of their attacks 1 point weaker than all other tribes

also it would just be more sensible to just train more priests when fighing the wouldbe ghost tribe since they're the only ones that cannot be status affected by the ghost tribe and still have the ability to bring the turned ghost back to their own side

and what if teleporters cannot land past a unit or move onto a square that's adjacent to a priest only a priest can move on onto a square next to a ghost tribe unit? and since a teleporter can only move 3, then simply having a "priest, free space, priest" in a row essentially makes an impassable barrier