I think a 18 gauge Ashaway kevlar main and a synthetic cross could be the ideal setup for some people. It will give you great spin and control for about a week then it will lose a ton of tension and the control goes away. The power level of this setup is extremely low.
I recommend buying a stringing machine (get a klippermate if you don't want to spend much) and string it with full synthetic gut. Gosen OG Sheep Micro 1.25 strung tight is my favorite. It holds tension better than most any poly, provides much more feel and feedback than any poly string. The power and control balance is excellent.
Or if you must string it up with full poly. Restring every month if you don't break them first so it doesn't give your elbow trouble.
Good luck grasshoppa.