I tried TMY in Perceptol 1:3 about a year ago, but haven't had time to print yet. I took Barry Thornton's advice of shooting at EI 200 and cutting development time by 10% (from his book The Edge of Darkness). But I also went to semi-stand and extended the time appropriately, so that's the opposite direction from the one you're headed. The negatives look very good, perhaps overdeveloped a hair, but that could be my semi-stand adjustments being off a bit. Thornton was after greatest perceived sharpness, better shadow detail, and less apparent grain.
Microdol-X is a close equivalent of Perceptol, so the advice to shoot at EI 200 and cut development 10% from manufacturer's recommendations with TMY would still apply. You'd normally need to back off a bit more for constant rotary agitation, although with the Jobo and the 5 minute pre-soak now recommended, you might be pretty close at just the 10% reduction in time.
I didn't shoot any densitometry test frames on the film I shot, so can't give you numbers.
Lee