Manifestation is overpowerd.

[ano]

I think that MA Arco, Pythium, Bandar and MA R'lyeh can spam Mind Hunt quite well too. Huge astral income is definitely not required for it.
Yes, it is a good spell but hardly overpowered.

[Sombre]

Leech is perhaps king of the 1X spells. Ghost grip and frozen heart are also excellent, but leech stands out because it's surrounded by mostly crappy or hard to use blood battle magic.