What's the fastest way to do Eriana's Vow catalyst?

[prime11]

at the complete 400 activities part
-just looking for which ever option is fastest
i know its a grind, im around 80 out of 400 lol

-on a side note, i made sure to keep the gun in my inventory so it counts :)

[Tom]

I did mine in crucible survival, helped a ton with getting my Luna too.

[phixion]

I wouldnt specifically grind for it tbh it will complete by just playing the game and the catalyst isnt outstanding you get 3 more bullets in your mag thats it.

However, since above didnt answer your actual question: I think mayem is the fastest activity in the crucible playlist and gambit prime gives you 2 points maybe combine it with another weapon farm otherwise you will go insane. PS you can leave the weapon in the vault to earn progress since its a quest now

[Mez Koo]

Real Answer: find a time machine and grind it out while doing weekly powerful gear or bright dust challenges on all 3 characters each week with the 4x catalyst booster during season of the undying.