1. Trade Lavine for good value at the deadline. (or keep him for two more trade windows, this off-season and next dead-line.)
2. Extend Markennan, trade him if he won't sign.
Simple. Because of his length I see Lauri as more of a puzzle piece than Lavine who is an insignificant volume scorer who doesn't create easy buckets for others, rebound or defend well. Get what you can and probably sooner than later to help the tank, another year or two the team should be bad and collecting assets. Zach should be a short contract mercenary going forward, because I think he has good value to the right team or two that are contenders. He would be sick on the Lakers. Dallas might be interesting. Philly would be great for him and team. And if Reddick is fading he might be a solid piece on the Pelicans or Phoenix with their young cores and true PG's.
Nothing you can do if Lauri won't sign he won't sign. You have to get a return so you have to trade him. So sign him or trade him but don't do nothing and pray. That doesn't usually work.
I think AK will signal full rebuild and get it done. The key is you gotta get something for Lauri if its not a contract its gotta be a trade.