Master (5500-7500pp)I can agree with this
Challenger (7500-8500pp)
Major (8500+pp)
I don't know if this is possible for you, but instead of leagues based around just your pp have them be "DT league" "HR league" and "nomod" league. Most of my top plays will be DT but it would be nice to see the pp values of my HR or nomod plays in another league.