Ok [@Serpentine88] [@Grijs] it seems this idea could work.
I just need to fit it into the rules of the world.

The plan was that my dude (with help) slew his old master. A red god.
Basic plan was that the gods entire souped up army hated the god but liked their lieutenant. (My character.)
Massive battle, thousands dead, probably some outside freak event and/or loads of backstabbing.
Yoink red gods stuff, ey presto.
My idea was that the red god had some cool gauntlets that helped in sacrificing people. The idea was that it has rune circles so one doesn't have to write them every time one wants to sacrifice people to the wearer.


So, to become a god, my character must have an artifact. Bind himself to it and then kill himself?
I guess it helps if one does a massive ritual while killing himself? Preferably while killing lots of Justinianists/Yuwanists/randoms?

Plan was to be a red god with a strong army, but no lands. Being a roving warband needing to pillage stuff or extort people to get supplies. 
My char would then work to become the most powerful god in history, mostly by punching people in the face.
I'd probably fail miserably along the way, but it's the journey that is interesting :)