Why does this make sense to you? I'm trying to see your logic here, but I'm just not seeing what you're trying to accomplish. Batum, Morris and Covington are UFAs after this year, so are you trying to help Jody save money or do you anticipate signing a free agent next summer? Reed is a nothing burger as far as I can see. A 2028 Clippers first? Don't see the big attraction there. Are you just taking a flame thrower to the Blazers' roster in order to tank even harder? What is it you see in this trade that makes it appealing?
1. A necessary condition for any trade suggestion worth making is that it's reasonably likely that the other team might agree to it. This trade suggestion meets that requirement in a way that 99% of suggestions on this board don't.
(Yes, of course, it's not a SUFFICIENT condition (otherwise us offering Shaedon for a steaming pile of dogshit would be a good trade. There's also the requirement that there's something in it for us. And in this case there is, as I shall detail.)
2. Paul Reed is not nothing. Here are some last ten games stats.

3. If you don't like the Clippers pick, suggest another. But to me, a 2028 Clippers pick, when Harden will be nearly 39, PG13 will be 38 and Kawhi will be turning 37 sounds pretty likely to be a good one.
4. Sure they're our best players, but I don't know if you've noticed but we're complete shit. And if we ever get good, they'll be old by then. So you must think we can get more for them. But notice what we're getting is almost exactly what Philly got for JAMES HARDEN. You get what you get.
5. I'm not concerned about saving our weird owner money, and yes, it's unlikely that we'll sign good FAs (if there are any) but you can do other things with cap space, as OKC has been showing for years (enable other teams to make trades by taking on salary for the price of pick(s)).
6. Addition by subtraction. To me, these guys' main value given our situation is as mentors. But I think Batum can do that. Or failing that, pick up some old guy currently sitting around unemployed. But right now they're standing in the way of minutes for our young guys, which is only forgivable if we've got a shot at the playoffs. Which we 100% ain't got.