I have used both Michelin Anakee 2s and Continental Train Attacks on my 2012 F800GS. I ride on the road but wouldn't hesitate to do a bit of light off roading if needed.
I got around 9,500 miles from the Anakees 2s before changing for the Trail Attacks. Both tyres are solid and great in both dry and wet. I suspect the Michelins would be better off road.
... a state of suspended disaster ...