I did some test on how challenges work.

So I have been curious if challanges get finished slower, faster or at the same rate on bronze compared gold. Here are my results after 2 gold games with 4 people compared to 2 bronze games solo. No consumables used at all.

Starting out before the games:
Charge was at 30,745/50,000
Backlash was at 3,363/50,000
Weapon(Scattershot) was at 121,245/140,000

Ran a bronze solo and extracted
Charge now at 32,498
Backlash now at 10,393
Weapon now at127,653

Ran gold with 3 others and extracted
Charge now at 33,612
Backlash now at 10,897
Weapon now at 131,734

Ran bronze solo again and extracted
Charge now at 36,872
Backlash now at 17,921
Weapon now at 139,341

Ran gold with 3 other and extracted
Charge now at 37,932
Backlash now at 18,739
Weapon finished

My results on average:
Charge: Bronze +2500. Gold +1000
Backlash: Bronze +7000. Gold +750
Weapon: Bronze +6500. Gold +4000

Just from those 4 games, playing on bronze gave me significantly more points to my challanges, but the downside is only 8,000 mp credits compared to 55,000 mp credits on gold. So my conclusion, if you need money play gold. If your trying to do challanges, play bronze solo.

If anyone is good enough to solo golds without boosters, please help and relay any info you have here on how well gold solos help with challanges please and thank you. Thanks for reading. I hope this helps a few people out looking on how to get challanges done as fast as possible. Any constructive thoughts would be much appreciated.