I've maintained a 4-5-1V formation for the past 3 levels, rarely changing it, and when I do it's only small changes, ie. a DMC to a MC, as the formation is fairly versatile as it is.
And I know how orders work etc.
So tell me, why can I not win against a narrow diamond? Doesn't matter wether it's a team of similar quality or lower Q, I really struggle.