I would think you'd want to deadlift more (more sets, reps, etc) than squat ..... if the 1/4 ton deadlift is important to you.
Maybe do the bare minimum squatting, because your knee is injured anyways.
maybe just ramp up to a top set of 5 (med.effort)
And deadlift 3x5... 3x / week at moderate weights. Throw in a heavy set once a week.