I know this could be a potentially dangerous combination, but I believe I can make it work. Will angelfish and severum be compatible in a 40g? Any advice would be excellent. What I want to know is which should I purchase smaller, and who will bully who, If I purchase the severum at all.

I'm in the process of cycling my 40g hex, and the plan is to stock it with a mating pair of angels, some sort of bottom feeder, and potentially severum, depending on the feedback I recieve here.