Putting an OP either fuel on Ango is a bad idea; they are in the middle of the map.
Yeah I agree with that, I don't use this stratergy myself I much rather have an extra unit in the early game but the OP can work. It is probably best suited for Langres if anything as the OP is relatively safe. Angoville is a flanking friendly map, especially when Wehrmacht is north. I don't think I've got m8 very often straight up on Angoville, do it more so when I am North Ango if anything.