Raptors trade Poeltl and Davion Mitchell for Mitchell Robinson (who they can trade again in the off-season), Achiuwa (filler), Dadiet (young wing w/ potential) and a 2nd rounder next season (that they can traded, if they want). Raptors can still continue to develop their players when Robinson comes back in February, while still tanking. Dadiet has a good motor and has great defensive potential. Assuming they are top 5 in the draft, they can keep Robinson, while adding a non C target. If they are 5-14, they can trade Robinson and draft Maluach or Derik Queen.
Knicks get Poeltl (who they can slot at 5, if they want KAT at the 4) and Davion Mitchell (who is an elite POA defender, who can shut down smaller wings). They can have a starting line-up of Brunson-Bridges-OG-KAT-Poeltl with Davion-Deuce-Hart coming off the bench). Best part is that they don't even have to give up Kolek. They can probably get a bench big off waivers, assuming they don't want to play Sims.
Spurs get a 2nd rounder and salary that the Raptors don't want.