343 i would like to say thank you for making challenges worth the time to do them now. i remember when weekly laso challenges were 15k a piece and here you come with a win 50 games weekly challenge worth 30k, you actually make me want to complete the challenge. thanks!
They are deffinately doing justice so far I believe!
However, a sharp decrease of the “kill X amount of enemies in matchmaking” challenges would be nice. 
I shouldn’t share, but have you ever tried Grifball? 4 double kills in a game? SURE! 20 kills isn’t too much of a stretch, unless your teammates are awful, or bent on scoring quickly. I will admit that 10 Headshots in a single game is impossible for me though…
> I shouldn’t share, but have you ever tried Grifball? 4 double kills in a game? SURE! 20 kills isn’t too much of a stretch, unless your teammates are awful, or bent on scoring quickly. I will admit that 10 Headshots in a single game is impossible for me though…
the 4 doubles can easy be done in living dead, but i made the mistake offen to make triple and more kills 
and 10 Headshots can easily be done in SWAT…
but im also glad the increase of cR with the challanges and the type of challanges… make it rly more fun.
I much prefer the “kill x enemies in matchmaking” than “kill x enemies” in Firefight. But the balance seems to be pretty good right now, so I’m not asking for change.
The credit reward from challenges is now a bittersweet thing for me. I havent been on since about the time 343 took over, so seeing how easy it is for people to get credits is a little upsetting, but atleast now people rank up a bit faster and dont complain about how long it takes. Just so you all know I have beat all the missions of halo 2, 3, odst, and reach on SOLO legendary all 13 skulls on (yes i played with blind, unlike what the challenges on reach called laso), ive also done halo 3 and odst all 13 skulls CO-OP as well, its not very difficult so the credit value shouldnt be massive.