This worked great for me.
I used to pull every week (a la 5/3/1) and made good progress. However, I stalled around ~550.
I started training with a group of powerlifters who followed a lot of the West Side methods. We never did competition deadlifts, but we'd do pin pulls, pin pulls w/ bands, reverse band pin pulls, etc, etc. We used box squats, good mornings, speed pulls and special exercises to target weak points too.
A year later, I'm guessing my deadlift is ~680. I might do a heavy pull 1-2 a month. I know based on my PRs from pin 1, 2, and 3 what my floor deadlift is.
It stands to reason that if you make your deadlifting muscles stronger, then your deadlift will increase. Deadlifting isn't the only exercise that strengthens these muscles. Box squats are great for your hips, good mornings are good for your entire posterior chain. Speed pulls help you practice form and also train explosiveness.