S mines win games, they are honestly so good and should not be overlooked.
You can place them on some of his flanking routes, forcing him into your MGs and helping you win engagements much easier.
Sneak pioneer behind and place on retreat path for easy wipes (easy in 1V1).
Put them in hard to spot locations like between buildings and hedges.
People don't realise that sometimes to counter something strong you must focus on the other part of his army. Kinda like facing a Tiger Ace and trying to wipe his inf for bleed.
You seem to flood alot of munitions as ostheer. Versus above average Playes minefields get cleared via every kind of vehicle, sweepers or indirect fire 4/5 times. As tradeoff your infantry has still stock rifles, your tanks dont have a pintle mg and doctrine abilities are overrated anyway. And who the fuck needs tellermines.