As a rule of thumb, for FLAT formations I like to use
Passing Mixed
Passing Style Mixed
Unless I have one outstanding winger then I pass thru him.
The other orders are up to your preference.
Secondly, playing 2 DMCs, I'd go for a wide back 3 with blue arrows on the DMC. Then given the thin attacking options, I'd use Normal mentality. should work some times but not all the time.