If you are squeezing too hard maybe it is the grip, change something there. Might even try going bigger not smaller. I had TE for a big while but addressed with many equipment changes, grip being one. I use a leather grip with a single overgrip.
Other components were a heavy flexy racquet RA 62, 355g strung, smaller headsize 95, open string pattern 16x19, being picky about my gut/poly choices (cofocus 1.18 is the stiffest cross i can handle). Any of the "soft" polys are ok as crosses, but keep the tension below 50.
Incidentally most full multis bug my arm. Gut/multi is ok though.