Cyclocross - Where to put the best tread

The rear tire on my knobbies is quickly transforming itself from a block tread to a file tread. That is, the knobs in the center are wearing down.

I know with road tires the rule is to put the tire with the best tread on the front, but it seems like when I'm racing it's always my back tire that ends up sliding.

Would it make sense to switch the tire with more tread to the back for off-road purposes?

nope you want the tire with the best traction on the front for cross too

There was talk about mixing a grifo and a fango, using one for front and one for rear. I forget which one goes where. I think it was grifo front and fango rear, but not sure.

Maybe use 2 different tires? Thicker tire on the back?

you want the tire with the most grip on the front for cornering

you want the tire with the most grip on the front for cornering

But if the front doesn't slip and the rear does as the OP describes...

But if the front doesn't slip and the rear does as the OP describes...

If just the rear slips you can often recover without crashing. If you do go down it's usually not as bad as when you crash if the front washes out.

If just the rear slips you can often recover without crashing.

That's a good point. While I've been feeling it slide, I haven't actually crashed because of it.

yeah i would much rather have my rear slide out than my front

plus drifting is a skill ;)