Grew up on Prestige Classic 600 and then Pro Staff 6.0 85. What arm fatigue?Is the 353 grams static strung or unstrung? If it's strung, why wouldn't you just lead up a PS97. You would end up with a racquet which is more maneuvarable and probably a bit flexier. If you went with a PS97CV it would be softer and flexier still. Both these options would be supercharged with a full bed of decent co-poly string.
I know this is an RF97 thread but I imagine there are a lot of RF97 users out there who would do very well to try a PS97. Much easier to generate higher RHS with a PS97. And you don't have to be Superman to still play a great game deep into the 3rd Set.