Necromancer is the best build!
Fun game though! Just needs a little more balancing.
I think the biggest thing is discoverability, both of the ship types and of the fact that you have resource points to put into the ship at the start. I embarrassingly didn't find that until probably my 20th death, and, on the turn I found it I cruised to the top of the leaderboard and never want back, leading me to think that no one else was finding it either.