Tmax dev 1:4 is my base developer for everything.
Kodak lists 2 temperatures. I use the lower one only (20c).
Easing up on agitation if I have sensitive highlights.
I develop about 15 rolls per pre-mixed gallon re-using tmax 1:4.
Improving economy to about .25 per roll.
Tmax gives a "clean look" . Transitions can look a bit abrupt sometimes.
If I want a grittier look I go with Rodinal. Those are my only two.
Done experimenting.