Playbooks

Over is the defensive front variation of the 4-3 that shifts the strength of the line toward the tight end side, sliding the nose tackle to a shaded alignment and putting the Sam linebacker on the edge. Unlike 4-3 Under, which slants the front weak and frees the Will to run downhill, Over stacks bodies on the strong side and asks the Will to play in space. The NT tag matters here: you are running a true base 4-3 personnel group with three linebackers on the field, so the alignment naturally leans run-first while still carrying a deep playbook of coverage shells.
Use Over as your first and second down base call against 21 and 12 personnel offenses where the offense is committed to running into the tight end side.
Rotate between Cover 3 Sky, Cover 6, and Cover 4 Palms so your deep shell reads identical pre-snap and forces the offense to hold the ball an extra beat.
Manually user the middle linebacker in Tampa 2 and Cover 2 Hard Flat and take away the seam yourself. That is the exact throw both plays give up if you leave the AI to cover it.
Save Thunder Smoke and Olb Fire Man for third down and long, and pair them with a press call so the quick game does not beat the pressure.
Check out of Over into a nickel or dime set as soon as the offense goes to 11 or 10 personnel. Do not try to win a coverage rep with a linebacker on a slot in Cover 2 Man.