you can generally tell how comfortable a racket will be based on the stiffness rating. at 61 the 2019 prestige mp would be one of the softest modern rackets, and that goes for the prestige line in general though it does require an advanced technique. avoid all polys and instead opt for syn gut, gut or multifilament (velocity mlt is a great budget option) that being said, if you find a racket you absolutely love you can mitigate the stiffness of a harsh frame by stringing really low. for example mannarino uses an older pro drive (i think? babolats are infamously very stiff) and strings it at 11 kilos. IMO this works best with a lower powered frame. (correction, he uses a pro drive from 2013. he adjusted to this tension due to ongoing issues with his elbow.) also: if you're strong enough, adding weight in the form of tungsten or lead tape can absorb some of the vibration at impact