I just spent about an hour running from DSE to DSE to find one active or close to starting and only got half of the daily completed. The current daily only give 15% for each completed DSE, which means seven DSEs for the daily.
Either reduce the required number of dailies to three (like it was on the old DSE mission) or speed up the reboot time. It is far easier to do the Rom ground daily than the space patrol daily (and let's not talk about the long wait on the Tholian Red Alert).
Sign up for the patrol daily and radiation daily. The quick combat missions are in Japori, Beta Thoridor, Carraya, Starbase 234, Beta Lankal, Archer, Narandra, Gamma Eridon, and Galorndan Core. You'll have a pile of radiation to trade for marks, good loot and garbage loot.
Beam down to New Romulus and hit the vendor- he pays 50%.