As insane as it might sound, using red boxes to cap your other lights is a hell of a lot faster. But then you are stuck dealing with red boxes. If you're going for dark rings, be sure to obtain a lot of Ebon!
entered with 118 min and ~15 min before time out pearl/azure was high enough to get enough TE drops to farm another 6 hours and in the end lights were capped :D
hmmm capped amber sucks for augmented item farming, ~110 amber is best.more amber and useless KI's and temps will be in chests too often.
and for TE's ~120 azure is enough