Yeah, I feel like there needs to be a non-armor way to break elite garrisons, and I think that artillery (especially "shoot and scoot" version) in combination with E-Inf or E-Par might be able to do it. Elite Garrisons are more or less the de-facto Supply cache defense at this point I think. Cheap, cost-effective, a good spot for a garrison, and now they don't retreat, so even better for preventing quick knockouts. Add a layer or more of defense in front, and suddenly you have a pretty tough defense. I still think that a quick-moving, hard-hitting armor build is the most effective, but undoubtedly it's easier for White to adopt that strategy than any other player (the additional funds mean that White can always go for a quick knockout). That constant threat means that everybody else has to adopt at last some element of defense unless they plan to completely neutralize White on the first turn, just to guard against that constant threat. Honestly, I'm not sure why you've not placed units in the Southeast, Marshall.