One option I would consider strongly is that of fungal slurry treatments. I think I would take a known aggressive culinary variety, like Oyster mushrooms, or maybe winecaps, make water and mushroom slurries of them and inoculate piles of woodchips. When I saw some myceliation of the wood chip pile, I would spread the pile out over the bare infected soil and add more slurry. I would probably hold off on the application of actively aerated compost extract until I saw some establishment of the slurry fungi in the mulch and into the soil. The compost extract would then go to feed the fungi in their fight against Phytopthora infestans.
How high can fungus jump? :)