My favorite is the Dreadnaught because of the Hive Architecture and the insane amount of loot opportunities (chests that require keys).
-
By far best patrol quick runs goes to cosmodrome. Usually a kill captain and or kill enemy in first area. Go right kill the captain in back room( near beginning of story). Run back out usually kill enemies and or kill captain. Go to orbit, repeat. Takes a lil over 5 mins to do 2-4 patrols. Plus taken usually appear in second area once u do first captain kill. Works everytime.