Well it depends on what you need, I haven't been up on what Miller has been doing but I think he just brings 3s to the table. Between Teo and Dinwiddie, I would opt for Dinwiddie, DLo can get hurt again and he must have been dropped in your league because they think his value is gone with DLo back, I don't think that's necessarily the case. Atkinson is figuring things out with the 3 pgs and I think picking up Dinwiddie and seeing where it goes to be a solid move. Teodosic seems to have a reliable role as well but I think Dinwiddie does a bit more overall.

Teodosic > Dinwiddie (fading a bit recently) > Miller (limited stat set)

I like Dinwiddie in general though Teodosic has the more favorable playoff sched in h2h.