you can't keep playing 3 cb's constantly. you either play rugani (no thx) or include danilo in the rotation. plus there's the midfield issue too. we barely have 2 acceptable cm's, let alone 3. then you'd also have to play our wingers slightly out of position. and 2 strikers, nah. too many issues.
for me 4-2-3-1 it is, at least until arthur recovers. then we'll see how he can cope with the immense physical load of a 90 minute serie a match