When I was in a similar situation, I made great progress lifting 6 days per week, alternating between upper and lower body, and moving through slightly different rep ranges each workout. It got me squatting 465x11 and 497x7 in just a belt, and I was benching 325 for multiple triples before I strained a pec. Don't feel like typing everything up, but if you're interested, read what I did starting here.
hamburgerfan's log chapter 2: histories of gluttony and diligence
Keep in mind that if I did it again today, I would be more conservative with the weekly progression, and include more assistance work for the upper body to keep balanced and healthy.