Pierce for Marion+VC and the #13 works out perfectly.
VC could be an interesting piece for Memphis or another contender in need for scoring. Marion is a big piece who can help contenders and/or teams in need for saving money.
By the trade deadline, you've gotten rid of those for better assets, or let them expire in the summer to make room. It's a win win because you know Dallas will buy Pierce out to let them go with KG and Doc.
So you could have the 13th, the 16th and the 25th this year. A bad draft? nah. Take Shabazz and Schroeder with the first two, and the biggest project who slips at #25. Let the kids lose games and develop, they'll be a lot of fun to watch and you'll have your top 10 pick or even top 5 in next year's draft. Any of the top 5 or top 8 picks could be a building piece, and you'll have enough flexibility and assets to make a trade for a star.