your 3-1-5-1 is this ?:
————-ST–—————
—MC-MC-MC–MC-MC—
————DMC——————
——-DC-DC-DC-———— or

————-ST–—————
—MC-MC-MC–MC-MC—
————DMC——————
—-DL-—-DC-—-DR-——

???
Also should I play defensive with counter attack since they dont have DMC ? or play offensive with offside trap ?