Welcome to WorldBeyblade.org Mojo!
As for your combo, I wouldn't recommend using any beyblade part in the sharp series ever, Mostly because of how tippy they are, Instead, ironically the Defense Series is the all time best for Stamina (D, SD, WD, EWD). Why not try switching to one of these tips (WD EWD and SD for lower heights and D and SD for heights above 145). Maybe you'll see that the beyblade has good life after death and can spin for a long time after it lost a lot of spin, On the WBO that is referred to as LAD and is a really useful part of making a good stamina beyblade!
Hope you enjoy your time on the website and learn a bit about beyblade while you're at it, I'm pretty new myself and i've learned tons about the beyblade Metagame.
Welcome to the WBO, Mojo.