"The main purpose for believing in these Gods is to gain from the help the gods provide (see below) and to provide basic faction play (I.e. "My god is better than yours")."
Your idea of "battles over gods are not allowed" is a nice one, but completely goes against what seems to be the purpose of this plugin. Just from reading over the description on the website, I could see it becoming a bad thing very quickly... Some people are already touchy enough about religion on this server, I don't think bringing fake religion into the game would be wise.