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
Those were indeed solid tactics back then, but they do not work any more. Even if the sandbags get built, the Dingo can simply drive up point blank and mow your pzpios down far quicker than they can it.
I used to think Panzerjaegers would also deal with Dingoes easily, but that's behind the 6 min timer or after teching up and clashing with your MG choice. Get a fast Pzjaeger and their inf/MG will walk over you.
250 is xp food for Dingoes at the moment, no exaggeration. The armour nerfs have made it an easy matchup. Don't get me started on the bike vs Dingo matchup. I've had easier times with a Kubel in COH2.
By the time you have spent 150MP on the Combat Half-Tracks and grabbed 250 autocannons @60 muni, they'll have AT boys easily and have been dominating you on the field with their own inf meanwhile. Perhaps on Gazala this will work, everywhere else...not so much. And even if you keep them at bay, the Humbers/Stuarts will come and hardcounter your 250s with ease....and any other LV you put out.
Personally I've only been able to make a steady creeping advance work, focused around a full combined arms build (Bike + Inf + MG + ISG + PaK), but this is more difficult than simply 2 x Dingoes + Inf + MG = Ez map control.
Inevitably, when this thing does get nerfed, a lot of UKF players are going to see their WRs crash through the floor, just like AT boys.