movdqa
Talk Tennis Guru
A pal of mine - former college slugger with a pretty big game - ran into a ferocious case of TE some years ago that completely sidelined him for a few months. He regularly played the PD Roddicks, but his arm blew up when he switched into full beds of poly. He did a lot of things including physical therapy, acupuncture, massage, etc. to get his arm squared away.
He loved those racquets and wanted to keep playing with them when he finally returned to the courts, but he thought it would be smart to switch to softer string. He had the means, so he got several sets of natural gut and had me string a couple of his PDR's at different tensions so that he could find his best tension.
I can tell you that his comeback was borderline miraculous - no pains, no twinges, no issues at all. After seeing this story play out up close and personal, I'm convinced that step #1 for anybody looking for arm-friendliness needs to go for softer strings in any racquet they might prefer. Since you're liking the same racquet as this guy, I'd say keep trying different strings. You may not need to go all in with natural gut, but I'll bet that you can find something workable in a string that won't devour your arm.
For me, the solution was to go with higher static weight and higher twist weight. I use ALU strung at 52 pounds and it feels fine.
As far as the power issue goes, I just add lead tape until I get enough power.