The first time I tried them, I was totally outplayed. Both my drs and dls were dr/dmr and dl/dml's.
I now look for dr/dc players on the transfer mkt.

I played against a much stronger opp in the cup semi and he played dm and am wingers. I went through the middle and had 80 % possession and game.

I suppose it's the strength of the team and tactics and opposition formation and his tactics that dictate the use of wingers.
My dr and dl seem to provide sufficient support to the mid out players when playing with red arrows and they defend as well.