TT farming in Old Aqueduct suppressed at CL5.8 but it's difficult to find crews nowadays.
SMEB and SMOB give out the highest gold and orb loots in the shortest time so that's the best place to farm AFTER you level one of the SMEB/OB recommended rings to CL 10
+ all 12 buffs.
There's 14 there but you do not need to include Sweetheart's, though. And I recommend NOT including Sugar Rush. But you can swap it out for Bandage, but I prefer to use Integrity (or you can put Fitness if you don't have it).