I can't help you with Xtol (the Massive Developing Chart has times for stock solution, not 1:1) but I can suggest times for Efke/Adox 25 in Rodinal. I use Rodinal 1+100 for 17 minutes at 20 degrees Celcius, 30 second initial agitation followed by 5 seconds of agitation every two minutes. One minute pre-soak in water too. I'm quite happy with the results.
I have some time recommendation for 1+1 (7:30, EI25) in my databook but I'm not sure about the results.
Instead try Efke25 EI25 for about 11-12min in Xtol 1+2 at 20 deg C and "normal" agitation.