well I'm against high reps on regular deadlifts. The thing is that form tends to suffer once you get high on the reps. If you want to do high reps for something like that, do RDLs. DLs will put mass on you even though you use like 6 reps though, just do enough sets so that volume gets to be around 30
Romanian Deadlifts (check the technique article sticky)
volume is total reps. for example 3 sets of 10 is 30 total volume.
unless it's RDLs then just pump out as many as you want.
30kg weights + the bar which is 20kg, that's 50kg. And you need more compound work on your legs on the leg day. you only do one "real" exercise!
Squats
front squats
reverse lunges
you could do something like that, then add some calf raises and leg curls if you want.
Just a suggestion