So, I’ve recently started grinding Halo 5 again and after some basic calculations I’ve found out that I need about 86 gold req packs to collect everything. Which is exactly 860,000 points. Is there a way or game mode that I can use to grind these points quickly enough before H6 comes out? Me playing the game has been pretty on and off in the past couple of months. Also, I don’t have much REQ boosts in my collection to help out sadly.
Heroic war zone firefight is probably your best bet. Definitely war zone playlists in general. Arena barely gives scraps even with boosts. Another good method is to sell everything you don’t need. You would be surprised how many needlers, warthogs, etc accrue over time
Alright, thank you so much 
Yep, heroic ff is the best if u don’t have many reqs.
and I don’t know how you made your maths but I recommend you to unlock first the silver packs, then It will be easier for you to get the gold packs because u will have more reqs to use and everything from the silver packs unlocked. Then you can unlock the ones from bronze packs, the 3 give you different certifications, so you can be buying everyday goldpacks but they won’t give you the bronze and silver things.
for example, carbines never are in gold packs an they’re very rare in silvers, but you can them in bronze packs, the same with the speed boost but this ones can appear in golds an silver more frequently.
ps: once you get everything from silvers, they will give you back 3k for every pack, and you can save more points from gold ones. And if you grind a lot of ff, they will give you a lot of packs