Apologies if this has been answered before, but WHAT is the deal with cR values for challenges like today's?!? (12/22/2011)
So if I "Kill 1000 enemies on Courtyard in Firefight Matchmaking.", I get 3000cR. OK, not bad, but that's a lot of work. BUT, by even attempting this, I would presumably get "Kill 120 enemies in Firefight Matchmaking." for 3200cR. Um, WTF, am I missing something? Why is way less work worth more?? To make matters even more confusing, I could "Kill 125 enemies on Glacier on Heroic in Firefight Matchmaking.", but for only 1100cR. Why so little, comparatively?
And so the other time-consuming (possibly even difficult) challenge for today is "Kill 200 enemies with headshots in Firefight Matchmaking." for 3000cR. This seems acceptable, especially if you were gonna go for the 1k enemy challenge, but it would take a while regardless.
It just seems like there's absolutely no consistency with these things.