Level 100 soldier with SPB, before I had any ai armor. I made a lot of credits farming pred armor with that toon...and the hate tells from TL5+ when they got ODed were epic. Levelled that toon to 150 and made even more from s10. Should have maybe left him at 100, looking back now.
Other than that, the 15 engi who I have used to level 3 dozen toons. The last time I looked, that toon had enough xp banked to get to above level 50.