I could probably do both now. I tried once a while back with Squid, IIRC, and we got our asses kicked. But my skills in FF have gotten better with a wee bit of practice.
I'm down for Firefight doubles any time, just need you to be on when I am. I should warn you, I'm stuck at Moderate NAT (AGAIN!!!) and can't figure out how to fix it. So my partners typically get stuck with unusually shitty lag (I seem to be host nearly every game).
I've done everything, up to and including manually forwarding all the ports, which worked for a while to open it. But then it switched back randomly, and I gave up. I don't know if I need a new router or what, but I'd like to fix it before Halo 4 lands.
I was surprised my total was that high. I go weeks at a time without touching MP.