So, "West African" religion is a really weird name. It's like calling Norse religion "Northern European" religion. It gets even weirder if you reform it ("Old West African"). Wouldn't it be prettier if there was a better name for it?
I don't know a ton about the indigenous faiths, but a little googling and wikipediaing suggests that Akan religion was a local (Ghana, Ivory Coast) faith which had elements of polytheism and all-fatherism which are similar to European pagan religions, and seems a likely candidate for reform (as opposed to generic loose animism, which it's kind of hard to imagine 'reforming').
It also has personable characters, like Anansi, which could make for flavor text or possibly even flavor decisions/events.