Then farm glimmer. Do the first Mars mission again on heroic and at the very start you get 9 yellow bar cabal legionaries that pay 25 glimmer each. Takes a couple of minutes to get there and wipe them and it pays 225. So you could do it 30 times in an hour. That would be 6,750 glimmer per hour. In the process you will get a load of "Network keys" dropped that each pay a bonus 200 at the cryptarch. Another one is to patrol the Cosmodrome. When you spawn turn left and go down those steps to the old russian railway station. In the first room to your right you get three yellow bar hive (two acolytes one knight) spawn that pay 25 each. It happens every time you go down from the surface so kill all three for 75 glimmer in about 30 seconds then go to the surface, back down and keep repeating. It might be a slightly quicker method than the Mars one so may 75 glimmer 80 times in an hour? That's 6,000. You'll also get Black Wax Idol drops which are either useful with Eris or you can activate so they pay more than 25 per death. In al this you'll get greens and blues from time to time too. Break the weapons and armor and some items can pay 50 or more which just bumps the per hour figure. Bottom line: it's not that hard to bump the Glimmer level back to 25,000 each time you use 7,000 for an exotic weapon upgrade or whatever else you spend large chunks on. In fact just playing through higher level missions for other reasons (bounties, dailys, weeklies, strikes) will involve a load of yellow bar enemies and drops that pay in various ways (house banners, silken codex etc) so just play the game and it fairly quickly bumps back to the 25,000 limit anyway.