Ok, that's good, I can read and understand how a class will be played simply looking at the class level progression and it's spells and abilities. Yay for me !
I'm not saying this build is bad, nor the idea behind it. It was more trying to understand the real role of this character in the party, what his build will bring to the comp.
All in all, the comp you proposed is really to my liking. I'm still looking to the other path with a Sorlock as MC to ponder what the alternatives are.
Oh and BTW, in your opinion, what race should this Druid be ? The thing is, I'm planning on an evil playthrough so I'll be trading with Minthara (Astarion first here), Shadowheart and maybe Lae'zel ? I don't really see which possible companions are evil enclined other than those. Else, I'll make a mercenary through Withers but if I can avoid that, that would be cool.