Dynasty Trade: Barkley and Chark for Thomas and Moss?

I’m being offered Michael Thomas and Moss for Barkley and Chark. Do I take this in a standard 3WR league? I’m hurting at WR.

RBs:
Barkley
CEH
Gurley
Henderson
Akers
Gibson
Freeman
Pollard

WRs:
Evans
Chark
Green
Hilton
Cooks
M. Williams

What are your starting linuep requirements? How many teams? Is this PPR or non-PPR?

12-team non-PPR. 1QB, 2RB, 3WR, 1TE, 1Flex, 1K, 1DST.