Personally I can't think of anything better to add to an epilator than a razor. The main issues I have with epilating- particularly my legs- is that they just don't feel as smooth as when I shave, and there are always a few sneaky hairs that manage to avoid being savagely pulled from their roots. An added razor is perfect, it should deal with both of those problems.
The Braun Silk-épil 7 Dual Epilator has a non-slip grip for safe use under water and with shaving gel or foam.
Hopefully epilation + shaving + water/shaving gel should = a much smooother experience!