-Give him the two-year extension and a $500K/year bonus as a goodwill for the first couple recruiting classes
-Give him the staff bump to go out and hire an OC
-Give him the non-field staff bump (though I'm not sure why he needs an extra $2M for that)
That puts him at roughly $4.5M/year with four years left on the deal after this season. Load it with incentives: $1M/year permanent bump if they win 8 games next year, $1.5-1.75M if they win 9. That puts him at $5.5-$6.25M and eliminates pretty much any non-SEC school from being able to afford him. Throw in another $250K if they win the bowl game, which puts them at 9 or 10 wins. You've still got him under contract for four years, and now he's on par with the middle-third of the league.
If he wins 8 again in 2024, he gets another $750K and an extra few years. Wins 9, he gets another $1.25M permanent bump. That puts him squarely in the top half of the league, which he's shown he belongs in.