You're right Framer, the best idea is to have it on the front of a real tank, (instead of an "only" vehicle). I think the skinny (but heavy) rollers/flail, stuff not really effected by the explosion of the mine(s) is best.
Nothing better than exploding the ones directly in front of where you're going. Don't really know about costs of, but the flail seems ingenious for cheapness/effective as well, not to mention weight, and you can shoot over it.
Even if it wasn't the best, I vote for the flail as well.
All-Hail, Hobart and his "funnies".

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Morbius, Morbius! Something is approaching from the Southwest. It is now quite close.