Pisachas and Ganas

[Louist]

In one of my multiplayer games, I've come across an indy province with Pisachas and Ganas. A key position I need to secure lies just on the other side of this province, and the next closest route takes me through a dozen provinces already held by two or more players.

The problem I am facing is that I've never encountered either unit before and have no basis of reference to judge their strength.

I'd check the wiki, but it seems to be down, and the best information google offers is an off-hand mention that Pisachas are an undead gorillas (Lankan unit?), and that a patch gave Ganas a spectral shield. Could anyone elaborate on either unit?

Thanks.