I think I just completed my first gold match, ending up on top with not a single consumable used. Also with randoms, reviving, keeping lookout and doing the objectives. Feelsgoodman but I'm actually surprised it wasn't harder.
My favorite class right now is shotty infiltrator, currently rolling with the Salarian and a Wraith 1. Experimented a bit with humans the other night as well, no geth yet. Though I got the engineer so I already know that I hate hunter mode. Wish I could get some upgrades for it and the claymore but I mostly get useless stuff. I'm expecting a nerf to the proximity mine sooner or later as it's completely bonkers/awesome.