Monstercross is a bit of distraction.
Basically “what tyres for riding my bike on roads, bridleways and trails?” 😀
Big/biggish slicks (2.0 Marathon Supremes) for roads, b’ways and dry trails, knobbies to suit your dirt for the trails when they get wet.
Or compromise, but only you know what the balance of riding is going to be and how much you wnat to give away at each end of the spectrum.
I’ve been riding my 28c GP4S tourer over the hill on the trails on the way home. The volume means I have to take it easy on the downhills, but grip is not an issue!
I say go for the Marathon supremes and have fun finding their limits. They might be a lot further past where you thought they were!
They’re a great tyre and there’ll be times when they’re perfect , so you’ll definitely get use out of them. And get some knobbies for the winter if you don’t reach for the mtb anyway.