Bottomless Grief is just too situational to be really useful in any activity. It's a perk that builds upon your fireteam playing bad or making mistakes, instead of encouraging teamplay. So, here the idea. Change the function of the perk from "Increases magazine size. [b]While you are the last living member of yiur fireteam[/b], each final blow refills your magazine." to "Increases magazine size. [b]While you are in close proximity to 2 or more Guardians[/b], each final blow refills your magazine." This change would not only ressurect this perk but also make a lot of guns much more useful. As far as I know, Bottomless Grief rolls mainly on automatic weapons, such as auto rifles and machine guns (prime example" The Swarm"). Such a change would encourage walking as a team around and reward the "Stand in/next to Super Rift / Bubble" gameplay in all content types. I don't know if Bottomless Grief does refill from reserves or generate ammo itself on kill, but if it would be changed in that way, it would make sense to make sure it reloads from reserves.