You want FA's that fit the playstyle Vlade and Joerger are trying to establish in SAC. And Vlade has been very open about his prefered playstyle - "play uptempo, play together, play defense".
Plain and simple vision, but you need guys, that are able to keep up with the legspeed of our young players. David Lee, Pau Gasol, Joe Ingles, Ilyasova, Mbah a Moute - crafty vets for sure, but not exactly athletic powerhouses able to run up and down the floor.
If we want mentors one guy should be on top of our list and that's Tony Allen. Still athletic enough to play our prefered style of basketball, used to play against much bigger guys at SF, an unselfish player, one of the best defenders over the last 10 years and the heart and soul of a blue collar team. His lack of a jumpshot will hurt his market value and we won't be forced to drastically overpay to get him here. Grizzlies reportedly plan to only offer him the league minimum, which is pretty much an insult after all he did for this team. Most title contenders desperately look for shooters to add around their main ball handlers. I think we have a reasonable chance to add him to our roster and teach our guards and forwards some Grit and Grind, which is much needed with WCS for example, who is standing in his own way with his somewhat "soft" approach.
Allen, Temple and Kosta would be a great vet core of down to earth, hardworking guys.