Playbooks

Quarter 1-3-7 is a defensive set, not an offensive one, and it sits at the absolute extreme of the dime and quarter family: one down lineman, three linebackers, and seven defensive backs. Compared to standard Quarter 3 Deep or Quarter Normal alignments, you are trading almost every ounce of run fit and pass rush for coverage bodies. The single lineman is your only guaranteed rusher on most play art, which means pressure has to come from linebacker and safety additions rather than from a four man front winning one on one. That structure makes 1-3-7 a situational shell you deploy on obvious pass downs, in end of half two minute drills, and on Hail Mary defense where you simply want more athletic bodies in the deep third or deep fourth.
Save 1-3-7 for third and long, four minute defense, and end of half situations where the offense is empty or in 10 personnel and has no realistic run threat.
Pair the spy plays with user control on a deep safety so you can rally the flats and read the quarterback while the spy handles scramble lanes.
Manually user control a deep defender rather than a linebacker. The set is built to defend deep, so protect the shell yourself and let the AI handle the underneath drops.
Blitz out of 3 Double Buzz or Overload 3 Seam only when you have a pre snap read that the offense is passing. Show a two high look, then rotate late so protection cannot slide toward the pressure.
Do not sit in this set on consecutive downs. Sub back to a standard Nickel or Dime look once the offense hits you with a draw or a heavy motion package hunting the run fit.