You've done Starting Strength, Upper/Lower split, and bodypart splits. That, if done correctly, represents a few years of solid training. In those few years you should have learned a LOT about yourself and what works. How long have you been training? What seems to work the best/longest?
While a double bodyweight deadlift is commendable, if you have been doing things correctly for the past few years then you should be around 200lb bodyweight and fairly solid. That would be a 400 lb deadlift at 2X bodyweight. Not too shabby, but shoot for a 500lb deadlift as a good goal and don't be happy until you get there.
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