You really should try to do low speed with the lowest heat possible, actually--not high heat--the heat is what damages your hair. For me what works best is to plop for about 15 minutes, then diffuse until it's about 80% dry, and then let it finish drying on it's own. This seems to work for a lot of people.
2c/3a CG
HG products: AG Recoil, DevaCurl Set It Free