This is what I did to grind up my marks and I got pretty good results.

EOTS I would just keep taking towers, alliance would take one, then I would take one. I won most of my games in EOTS and was usually praised for constantly making alliance rotate to new towers usually keeping us with 2 and 1 grey, with them having 1 or 1 grey.

WSG I would always start on defense with my 4 guys, pop 4 fire eles right before all 8-10 ally would come in. I would drop them all most of the time, or atleast have the flag carrier alone and low on health for my team to meet up with them in the middle. With a quick cap like that, then defense would usually only have to deal with a couple at a time.

AV depends on my mood, but those 3 BGs I would almost always get praised because my focus fire would win most battles.

AB was another story. AB I would either win fast, rarely, or I would lose very very slow. The problem with AB is I can't just sit on a flag with 4 ppl, they bitch why is there 4 at mine or something. But then no one would defend what we cap. So it was my fault that we lost cause I was on offense taking alliance flags, or it was my fault cause I was on D all at one flag. I got so sick of it, to finish my marks I queued my 4 guys in seperate ABs staggered a bit. Then I would just defend the farm. No bitching no crying, we would lose a lot faster, or sometimes win, but I didn't have to hear it.