Went on a CRAZY hot run where I was #1 on my team and we won 3 or 4 straight games. The XP boost was giving me 50-80 XP per game which is a ton for me, since I don't have engineer or anything yet.
Everything just fell into place... it was BEAUTIFUL. I would have more kills than anyone else on my team, *and* like ~20 objective points.
I finished out 8/8 good behavior and 8/8 body count, and got to 7/8 medic revives.
I ended up powering through the rank in between medic/engineer, and the rank after. Stopped a couple points short of Engineer so I can look forward to that tomorrow.
Edit: Just to be clear I'm not trying to boast/brag. I'm an average player. My overall K/D ratio is about 1 even. The stars just aligned for me, this evening.