fuzz nation
G.O.A.T.
I decided to chime in when I saw this post and the knock on the Phantom 100X for a serious lack of power. Softer racquets can be quite cozy in my experience, but they can also have not-too-much authority if they aren't on the more hefty side. This Phantom looks like it's about a full ounce underweight to be able to thump the ball nicely with that softer flex rating, at least in terms of what I prefer in a racquet.
My most powerful frames are my Volkl C10's, which have a little weight added to their handles for some extra head-light balance over stock. When these are strung with synthetic gut, they give me superlative arm comfort, even when tensioned up at 58-60 lbs. in the warmer conditions. I can literally slug with these frames every day without a twinge - I'm a 4.5 player with a one-handed backhand, I teach, coach high school teams, etc.
I can also say that I strung one of these C10's with a full bed of poly a couple years ago - Volkl Cyclone 17 tensioned down at 43 or 44 lbs. - and that setup annihilated my arm/elbow after only two 15-20 minute hitting sessions. Three different areas of my forearm/elbow were lit up in the wake of that adventure and I was out of action for over two months. Never again.
I recommend making softer strings priority #1 in any frame you like, even if it's a little on the stiff side. No poly. If you want big power with a lot of arm-friendliness, I'd say give a C10 a test drive if you can, but consider others like the ProKennex Q+ Tour. In case you go with the Phantom, I'd say be ready to add a little lead to both the hoop and the handle to get some extra stability and decent handling.
A semi-soft frame should give you moderate softness paired with a syn. gut, but I'd expect you to get more than moderate softness by stringing with a multifiber. Natural gut is still the king of cozy, but it is pricey and you may not need to invest in that string to keep your arm happy.
