Best I managed on GLOPs during yesterdays event was 2.4mil in the RCR, definitely finding I can influence things better in a TD than anything else.
Covering spawn points from a distance and getting flanking shots really helps ease the pressure on people capping. The bunkers either side of the bridge are great for covering it and also the carrier, if your team has the carrier firing onto the bridge and village cap from it is great.
In an MBT (bought the chally ATDU)I'm finding an almost total lack of support while pushing or capping and very quickly get beaten down, hence why I find the above TD role really works to help the team, also as a lot of TD's are pretty quick I can reposition to support another cap as needed.
Been an expensive few days, with buying the ATDU and T15, plus a couple of upgrade and retrofits I think I've burnt over 70mil, clawed my way back to 32m but with more upgrades and retro's on the horizon as these two go up they'll be a big dent in that, but hey you can't take it with you