Want to try out another covenant but how do you go to 40 to 80 in the quickest amount of time? As it what can you spam that is repeatable, something like killing raid bosses doesn’t work for this since lockouts.
Since covenants are really only good at 80. Looking to do this in less than 1 day.
If comp stomp gives renown, probably that. But it ends tomorrow.
Spamming Torghast layer 9 has a high chance at dropping 1 renown each run, anima vaults doesn’t seem to give it. The drop rate plummets once you reach 70 renown, though.
Lower layers also give renown, I just feel like I get more from layer 9.
I think the easiest/fastest way is just to do your covenant campaign. The quests give a lot of renown now. Quite a few of them give 2 renown instead of just 1
This. I find I hit 80 Renown not long after getting to level 60.
Do you have a toon maxed at 80 already?
Npc in the city sells broker mark of distinction. It will get you 1/2 way there
Steal it like any regular person. Sheesh, I gotta tell people everything?
Semper Fi! 
Kill the world bosses to take advantage of the catch up renown mechanic (get three per boss up to 48 I believe). Then you spam torghast layer 9 or comp stomp. Also if you haven’t done ZM campaign it is solid catch up,too.
I’ve read that the ZM campaign gives loads of renown.