So, so I have a couple of plans we can try, though neither are particularly strong.

If we advance, Mold Earth can stir up the ground so to dig little trenches or foxholes to give us cover and the movement should hopefully set off any landmines there as well. This would be slow, however, giving plenty of time for them to interfere.

As an unrelated plan.

My familiar can be given a bomb and try dropping it on one of the machine-gun nests. That said if they do shoot at it while it tries that, well...

Goodnight Mr Crow. I haven't tried it yet because I figured they'd just shoot him down.