You have to pick:

Will the killer robots do my bidding? Cause that may change my answer

I suspect the killer robots would AT BEST do your bidding as likely as a human army would. So the more rich, smart, and powerful you are, the more likely they'll be following your commands. On the other hand, maybe they just hate all humans (like the Matrix) or perhaps they aren't intelligent but just have a directive to kill all humans that can't be argued with.

In any case, they are PROBABLY not on your side. If you are the president or a genius scientist or an eccentric billionaire then MAYBE you have a chance if you're lucky.

Does this only compress your height?
After 1000 sneezes you'll be 36.77% of your original height. You'd start becoming very oddly-shaped if it didn't shrink all your dimensions.
Do the WYR Pixies magically make it possible for your body to function at extremely small sizes?

Your body stays at the same proportions and yes, the WYR pixies make you able to survive at tiny sizes.