Mod challenges

"Xx1xx2xx2;c-1634747" wrote:
Today I play 2 challenges for 16 energy every, and win 3 star purple, and 5star grey, for fu what? For what in challenges 3 tier we can win mods below 5 star?

I'm not trying to dismiss your point, but mod farming isn't 2 challenges. I'm in a guild where guild-mates farm mods. I'm talking multiple refreshes daily, looking to improve what they have. And in the process sell probably 95% of what the rewards are immediately. If you want to farm mods, then you have to put in the attempts. Realizing that there are going to be days where you get nothing that's better than what you have.