Don't do patrols. It will take forever if your goal is just one to upgrade. Do the mission Fist of Crota. Kill the sword guy and restart until I get it. I got one relatively fast then a second and third unexpectedly. But if your trying for one. It's your fastest encounter. It won't be a engram. It will pop up like u completed a section on the raid. And don't use Bounty xp to level. It requires u to kill hive so search YouTube on tips for a quick upgrade. Happy hunting.

I got two from the earth mission, and one from patrol.

Patrols

I got all of mine on patrols.

I got mine killing the sword bearer in one kill that's basically how I got all mine don't know if it makes a difference or not but that's all mine have in common now, prior to that it was the eris bounty but my fourth wasn't an eris bounty, also my one hit kill also took out the three praying acolytes too

Dont farm for it, trust me, dont do it. Everybody in my friend list had it, even the most casual players I've ever seen.. I wanted it and did the first dlc 'story' mission literally hundreds of times.. I was up to 11 hours of farming (in smaller chunks, dont worry) but got no drop.. then I gave up and a week later I got the bounty from eris, the first one dropped and the day after it dropped occasionally during patrol... I levelled it once and upgraded it. Currently it isnt worth it. You wouldnt use it for more than 5 minutes as it is almost outpaced by blue guns.. To upgrade it to exotic status it requires a special drop from crota himself on hard mode. If you're not planning to own crota on hard the very same day it is released by bungie, dont farm it.. you will probably get it eventually anyways..

[quote]None... But can I throw out the question of what the most practical way is to do this? Should i be farming patrols? Or is it easier to do it through that mission from the DLC[/quote] When eris offers kill three blades of crota launch the first dlc mission and when she offers the kill 10 hive ultras or majors launch the forst dlc mission, it might take a little while but doing it that way you get a chance to get one without completely having to grind and grind, its still a grind but thats all I did.. I never intentionally went for husk of the pit but kept doing all my bounty like that and eventually got one.

Fist pf Crota when you defeat blade of Crota

Whenever I stopped actively trying to get it I got two in 6 blade kills

I got both of mine just doing patrol on earth.

Way easier doing the fist of crota mission