A wonderful combination, I find it takes the edge off the MDPV perfectly. Been using both for about a year now though, and am very experienced with em. Only ever eyeballed doses too, for both. I can scale down to 1mg +/- 2mg, but I always lost too much product, especially MDPV, it being so fucking electrostatic when it's 99%+ pure, I have an easier time dealing with the 2c's even.
Stupid and reckless? Probably, but it's worked for me, never over-dosed either chemical.