@TKK - First off, hang in there. Healing deep-seeded TE/GE can often take an extended period of time, as in months, not just weeks, mainly for longer-term tissue adaptation to set in, but you can heal eventually. The human body is a wonderous thing.
That said, I think a few things are critical moving forward:
1) Physical therapy needs to continue, with gentle build-up, ideally guided by a local physio.
2) Technique cleanup needs to continue, with guidance by your local pro.
3) For strings, if at all financially possible, I'd just go full-bed natural gut, strung at the lowest tension you can still control, otherwise the absolute softest, most shock-absorbent multi, and nothing else.
4) Overall,
comfort takes priority over performance, full stop, at least until you find a setup you can play more or less
pain-free for a normal-length session at normal daily frequency. If that means you have to play a brand of tennis that's extremely gentle, even dainty, then so be it. At least it's a starting point, from which you can intensify later on.
Looking again at racquets, first off, a correction on the Volkl Team Speed: from all references I've uncovered, RA is 63, not 59. Still relatively soft, but not quite as soft as you may have thought. At this stage, you might as well try the Clash 100UL, just for process-of-elimination if nothing else. There's also the Head Instinct Team L, which is the same 265g, 63RA and ~300SW strung, but has a more forgiving and powerful 107" head.
Hope that helps. Any further questions, feel free