what’s the best way of unlocking req packs
Req points, easiest way is to play warzone because you can get more Req points and it helps with your commendations which gives you Reqs for completing. but if you are just starting off only open bronze until you start getting Req points then you will know you have all the common unlocks, then do the same with silver and then gold
Warzone Assault is the fastest method for gaining Req points. The games are anywhere from 6 - 18 minutes, where regular Warzone can be 20+ minutes. Assault will give slightly less points I believe, but a chance at much faster games.
The difference between Warzone Assault and regular Warzone in terms of REQ points is quite minimal (not the best at the game type). So I tend to do assault since it is way faster. A top player in Warzone could probably give you a better idea of the difference in points earned.
I can generally make 1000 REQs per game of either warzone games.