Are you a hobbyist or in a massage school?
Generally reflexology for the foot uses corn starch (at least where I was taught), because you don't slide around that way.
I can understand how your school may not have goten into this early on, but I get the feeling you are asking along the lines of a hobbyist, and if so, you may be looking for some other feedback in that case.
Tall guy. What does that mean. 5'10, 6'3, 6'8, etc. Tall is subjective. You may need to be more specific.