I like the terms "relationship orientation" and "lovestyle".
I believe I'm close to 6, but maybe not quite there. I'm not sure. I lived in a de facto monogamous relationship for years, but I also was single for years and that didn't make me asexual. I just hadn't met someone I wanted to be with and who wanted to be with me.
Me: 31F, straight
Seamus: My husband, 32M, straight
Dragon: My boyfriend, 29M, pansexual, married to Fox
Fox: My boyfriend, 29M, homoflexible, married to Dragon