A top 10 pick straight up is very different than the 8th overall pick AND Dylan Cozens. I wouldn't trade Mantha for either of those pieces individually, but for both, absolutely.
I'm not completely against trading Mantha or any of our players / prospects, but it has to be a trade that makes sense. To me, trading Mantha for a top 10 pick OR a top prospect, doesn't make sense. It would have to be both.