i switch between tree and SOTF depending on who i go against and natures vigil and hotw depends on comp aswell i use vigil against cleaves and lock teams and use hotw against Rmp/RMD KFc etc i grab tree alot now days since my druid is mostly blue so i get hard switched alot and tree is nice for that and been poly immune against RMD is quite a big deal
TL;DR vigil vs cleaves/dots
Tree against RMD TSG Turbo WLS/RLD
hope that was some help to take full advantage of been a nub druid and wanna get ya free 2400 acheive grab ya self a good lock and rogue and play some RLD all u gotta do is stay passive and heal but if u wanna try push glad RMD seems the way to go but will require u to make some plays now and then
for those struggling with dispells check custom list for ccs it appears poly was randomly removed from it go wow head get id add it back and a few others u notice it does not dispel