No no no. Fish can be a loose cannon (with poor aim) out on the court. At least Blake can be reigned/boxed into a role. I love him like the next Laker fan, but Fish has delusions of grandeur whenever he handles the rock.
We just need a solid role player to back up Nash, and Blake is exactly that guy. it was too much to ask him to start, but he's perfect as a backup. Bringing back Fish might sound nice for chemistry, leadership, and a counterweight to Kobe, but don't forget that we have NASH to fill those shoes. Adding Fish would just muddy the locker room waters, I think.
Duhon is garbage, but if Mitch can turn him into something worth more than a bag of chips, go for it