Help Pick RB2 & Flex-2 of 3 choices

[ridetheseal]

Starting Mendy as my RB1.

Then out of these 3 I need an RB2 & Flex. Which 2 would you choose?

Addai (at Denver) Looked real good last week. This should be a high scoring game.
Forte (vs GB) Bears should be airing the ball out to keep up with GB. Forte s/b involved.
Welker (vs Buffalo)-Best matchup of the 3. Pats will put some serious points on the board this week.

Standard scoring league. Leave link and I will help w/yours. Thank you.