When I do deads, I stay with 315 for 15-20 reps. I too think they are overrated.
Of course, back being my best bodypart... what can you take from my advice? I got my sick V taper from all the years of swimming I did. Swim training was mostly pullups.
But when it came time to add thickness, I got my best results from modified cleans (lowering the bar only to mid thigh, bent over rows and seated cable rows