I've been a soldier all along, my Shepards too badass to rely on biotics.
+ i can always use my teammates.
I just started an engineer with additional assault rifle skills. So that's pretty badass too.
I guess I could add the assault rifle skill tree because I finished the game with a soldier before, I don't know. Anyway, I'm actually quite pleased with the decisions I've made with my soldier so this won't be an alternative playthrough but rather the same thing all over again with more sidequests and a non-traditional class.
I found that opposing all the politcians in the game gets you paragon points most of the time so that's cool because I hate the politicians and I don't wanna be a bad guy.