I'm 33 hours into ownership of the 2018 MX5200 Kubota. She called for 15-20 minutes of 2200 rpms and spewed out a big ole cloud of crap

While I was waiting - I googled how often should the tractor call for regen. And I read every 15-20 hours depending...I was about 30 hours past my last regen.
Question is how often does your tractor regen and what rpm do you run at. I usually run at 1500 rpms because that's all that is needed for the light work I've been doing. BUt I read i'm supposed to be running higher rpms - seems wasteful of fuel and motor service life. What say you TBN ?