I would drop Kessel before Palmieri. I've always found Kessel to be overrated in multi cat setups and he's even lost value going to AZ. Palmieri on the other hand is often underrated and I like him much more with your cats. A steady 55-60 pts, 200+ SOG and 100+ hits when all is said and done.
That being said, I'm not sure I'd burn waiver for Radulov. Dallas has been crappy and his minutes are down a little from the last two seasons. His hits per game have declined as well. I would stand pat for now.