Torque wrench setting for Magic Pie 2?

[Boyced]

Hi all, I'm looking to get a torque wrench to tighten up the rear wheel, what setting should I use?

[Bikemad]

I have steel dropouts and I tighten my wheel nuts to 75-80Nm, but I wouldn't want to tighten them this much with aluminium dropouts, as the washers tend to pull into the soft aluminium and can sometimes spread the dropouts, which can eventually lead to failure.

Alan