Buy In: 12 reps- bridge, side-lying bridge, superman, pvc good mornings.
Progressively load your deadlift working up to as much as 90% of 1rm, then:
Deadlift: 10 reps@90+ %. These can be single or doubles. Just keep 'em pretty and work until you get 10 total reps. Protect your back. Don't add weight if your form is degrading. Ask your lifting partners to film you with your phone. Good back position equals a much lower likelihood of subsequent low back pain (duh).