I have done stand dev in Xtol 1+2 at 1250 for about 30 mins with no ag. Worked nicely for scenes where some highlight control was required.
For dead flat low contrast work i.e. indoors with no direct light sources, I prefer to agitate which expands the tonal range and works IMHO better as less development time is needed, giving lower grain, fog etc.
You'll need to experiment as your rig/technique/printing requirements will be nothing like mine.