definitely Josh Richardson, Cousins got cut and I fell that lamb just isn't a big part of the Pacers team and this is up for debate but I think levert and warren are both within a couple of weeks within a return, I would go with Richardson because the Mavericks need more help to make the playoffs and I think richaardson will play a big part in it. 

@twintalkmn21 Cousins is starting on Monday now for them.  When is Warren due back?  Sources?

well cousins is playing on monday but they will cut him 

https://www.cbssports.com/nba/news/rockets-demarcus-cousins-expected-to-part-ways-in-the-coming-days-per-report/

TJ warren is coming back soon

https://www.si.com/nba/pacers/news/tj-warren-return-pacers-coming-really-soon

https://clutchpoints.com/pacers-news-caris-levert-tj-warren-injury-progress-revealed/

is that good?

@twintalkmn21thanks. Do you think Cousins has any landing spots that could net 25+ minutes?  That alone would make him fairly valuable.

true, I don't think there are many possible ones but anything is possible, I still definitely think you should go with Richardson right now, but if couisns if traded for al horford or for mason plumlee then maybe he'd be better for richardson but I really don't think he would be better than Richardson but it's your team and if you like Cousins that's fine,