Since you've already had success with something with a moderately weak cover with that layout why not go with the Riot?  

Using a ball that starts symmetrical will eliminate the additional component of deciding what to do with a moderately strong to strong pre-drilled PSA.  After all, there is hardly such thing as a symmetric ball once holes are drilled.

The Riot would be a smaller step in cover strength than the ROF or NS you have already shown interest in and it is usually easier to build an arsenal around one brand.

Coverstock type and surface texture are still the dominant factors in dictating whether or not a ball will match up with the condition you are seeking to conquer. Might be best to save a little money in the beginning and tweak the surface to get what you're looking for.