Whenever I killed that knight, he has never dropped an exotic engram for me, that damn f@#$!r...
I have about the same amount in my vault as well, will be grinding heroic strikes over the weekend for more engrams...
The most reliable way to get a guaranteed exotic with 4-5 three-of-coins for me:
- Go to Dreadnaught, pop ToC and do one Court of Oryx
- Do Ultra Knight
- If no exotic drops do Kings of Decay mission on hard on Earth (Ultra spawns in the first 30 seconds) with ToC
- If still no exotic then I swop characters and then rinse repeat
Sometimes I will have nothing on the warlock, then switch to hunter and get exotic at knight. I then still do the other steps and drop ToC before each ultra. When I switch to the titan I normally get an exotic and then switch back to warlock I will get one as well.
Last night someone initiated the cabal champion on the Dreadnaught and he dropped two exotics followed by another exotic by the knight. I generally have bad luck with RNG and in Y1 was only to get the Vex and Fatebringer in the 2nd last week of Y1 despite running the raids every week.