Can string bed have an equiv +/-RDA / relating arm friendliness?

Bear with me.....

If the collective advice for TE is low flex frame (for arguments sake)

What baring does the string bed play.....example: which is more arm friendly:
A low flex racket (say 59 RDA) with factory nylon/poly strings Vs a 64RDA frame strung with full bed of Nat Gut?

Is there a relationship / an arm friendly quotient that's a combination of RDA flex, Nat Gut, Multi filament, Nylon, Poly??

For arguments sake if the perfect arm friendly quotient for a racket was say 20:
60 RDA : 10 points
Nat Gut : 10 points
(IE: 20 = perfect)

Lets say 7/10 is enough, has anyone come up with a points system, that would show a more flexi racket with say Syn Gut is just as friendly as the above: maybe 58 RDA & Syn Gut (7 points), or 43 RDA (Max200G for instance & Poly ...say 3 points)

....anyway...its late and i'm waffling, if anyone understands what I'm getting at, would love to hear an opinion...or pointers to an already published article about it...
 
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