When TE has progressed beyond a certain point, no racquet in the world can sufficiently reduce the pain.
In fact, you will feel excruciating pain in activities that have nothing to do with tennis. You will feel unbelievable shock & vibration simply from pushing a shopping cart. You will feel sharp pain when holding up a jar or a cup of tea or even when washing your hair.
Some will feel constant pain even when they do nothing at all.
My advice: Rest and ice. Take a long time off tennis and ice it religiously until pain subsides. This may take a few weeks to a few months. But when pain subsides significantly, then you can do rehab exercises (e.g., flex bar), and when pain is almost negligible or all gone, you can come back with your PK and soft string.