Wow, cool

. I log on and the
top army list on the page is a forest spirit one! That's what I run, too
Boogeyman has some good points- the equipment on your characters is a little bit ineffective, especially on the spellsinger. She has a worse
BS than a noble, so the bow and arrows don't suit her too well. She'd be best off taking an arcane item (such as calaignor's stave) and a dispel scroll.
Your Treeman Ancient can take multiple spites, so he can take the Cluster of Radiants. It's safer on him than on your branchwraith.
The wildrider noble could really use the Dawnspear instead of the Spear of Twilight- only 5 points more, and it will help protect your fragile wildriders from being hit back.
Overall, I think it looks pretty good- very one-sided, but that's how forest spirit armies have to be. Mine is similar, but with one less unit of dryads, and a second unit of treekin instead of your third unit of wildriders. It's done well for me so far! There will be games where you have no good chance, but most of the time you'll compete.
The main thing is your characters... the changes above would help a lot. And even though you're light on magic, it's worth trying for it- you've got 3 bound treesinging spells from your ancient and treeman. If you take the stave on the spellsinger, she can cast it twice more (if she's a level 2). And if you upgrade the branchwraith to a level 1 wizard (perhaps by dropping the banners of springtide and zenith, which are not really needed) it can cast it once as well. One of them's bound to go off, unless your opponent is throwing 2 dice at each (very unlikely) which might be all you need to block the progress of an enemy unit, or protect one of your own, with a moving forest

.
I just noticed that your spellsinger is not a level 2! I would upgrade her... perhaps to get the points for that and the branchwraith's upgrade/equipment, you could drop a unit of dryads.
Let me know your thoughts, and I can suggest a possible list wiht some of these changes if that's helpful

. But your overall looks good once the characters are straightened out!