Nice list! It's cool to see blocks of 6 Treekin making it into other people's lists

. I'm betting this becomes somewhat of a staple for woodies! Although it is expensive, it hits hard and is pretty resilient, too!
I like that you're going with the lore of life

. People are definitely excited over it, and it's great that a lore we have access to is finally really good
Why the level 1 wizard upgrade on the branchwraith? That's 50 points for 1 spell from the lore of athel loren, which isn't really needed, I think? Or were you just wanting to get one additional treesining cast (in addition to the one on your treeman?). The problem is, trees don't hinder movement now, and you have to use your PD to cast the bound version, and I see your level 4 hogging all of the PD
I also thought Cluster of Radiants would be almost mandatory in this edition on a branchwraith, to close the gap between your opponent's PD and your
DD generated by the winds of magic. Maybe include it over Paegent of Shrikes?
If you drop the level 1 upgrade, you can afford 4 dryads to make your unit 6 x 2 and get full supporting attacks! If you wanted to save room for the branchwraith, you could only add 3 and use the points for Gwytherc's Horn on the noble (immune to psychology for a turn... I'm reaching here

) but I'd add 4 just for the extra body, anyway. It leaves you 5 points, and I heard there's a sweet 5 point magic shield in the rulebook now that you could give your noble, or just give him a normal shield and spear to use the points, or an additional hand weapon.
The wand of wych elm is going to be a life-saver, I think! Overall a very shooty list with a nasty close combat punch once you get close.