From my experience, I don't think you need to do anything other than keep deadlifting and do proper cycling. From your numbers, it seems you subscribe to the microcyling and use weird poundages, but I wouldn't recommend it. For the lifts where 5 lbs is too little of a jump, add 10 lbs. There are no lifts where 5 lbs is too much of a jump, and if it is, then it's time to back up and cycle upwards again from a fresh starting point.
As far as hip strength, nothing will bring it up like squatting will. Deep, ATG squats will give you tremendous hip strength.
I wouldn't recommend speed deadlifts because the deadlift doesn't seem like an exercise that lends itself to speed lifting, but I could be wrong as I have never tried speed deadlifting or any kind of speed lifting. The only thing that worries me about speed deadlifting is that it would seem very difficult to maintain super tight, proper form while speed deadlifting. Another point is that ballistic, explosive motion can only be used at the cost of power, so I wouldn't recommend ever going above 70% if you try a speed lifting cycle.
Still, to me it seems as though the deadlift is pulling off the floor in a static concentration of power, not trying to rip it off the floor. Trying to forcefully rip it off the floor seems like an injury waiting to happen to me. However, once again, I've never done speed lifting and so maybe someone who has can better advise you on this subject.
If you'd like, PM me with your current cycles/routines and I could cook up something for you. Either on this forum or
[email protected]. Good luck.