The author had just started posting and I only got to read a few chapters. It started out similarly to Battlemage Nonetheless; as a man betrayed goes through a magic doorway in our world and comes out in another world with amazing abilities. If my recollector is functioning properly, at some point early in the story, he's on a ship preparing to battle another group. That's as far as the story was posted before I lost track of it.
Thanks for any assistance.