Just throwing out another option here but you could also matchmake with just the ping. Take the geofilter radius out of the picture. Decrease your radius to zero and set the ping assist to your base ping +10 and see what kind of games you get. Oh yeah place your home location somewhere it won't cause you to get placed in a game because of the geofilter radius (i.e. the ocean).
Example below. You ping assist may not be the same but you can test and see what plays best for you.