Which one should I make first?
The fall is endless is a story of a fallen angel who falls to level of the demon king imprisoned there countless years ago through hell's endless levels of suffering
a race experimented on by the gods (a species put on a barren world and forcefully evolved and changed until the gods forget about them for a couple millennia and the last member of the race goes on a quest to destroy the gods.)
The Lich merchant of souls (name is explanatory)
A story of a man with so many reincarnations and memories, that he goes insane and even the gods cannot control him