I am genuinely curious - what is your solution to double Dingo as DAK? Usually this goes into double Humber or Stuarts.
What I USED to do against this was hug green cover with the double Pgren and keep 250 in the background for combined arms bonus + medical supplies. If the map has no green cover, you send Panzerpio early to the front and build a sandbag on the best spot.
What is he gonna do besides sit there & repair forever with the Dingo and feed you vet. This should buy enough time until you can upgun the 250 and get Panzerjägers. Unless I missed some crazy Dingo buff, this should still be viable. And if he is one of these people who put the sappers inside the Dingo and drive into you, the double pgren + pio + 250 will focus-fire the sappers instantly
I try to keep up with all CoH3 patches but again, I haven't played CoH3 very actively for a about a year now so take this with a grain of salt