It looks good to me! Do you think the wardancer noble is necessary? I'm just wondering if people will stop taking unit champions to avoid letting characters challenge away from attacks by the unit, neutralizing annoyance of nettlings (although it's still awesome for when it can be used!). Without him, you could fit in another counter-charge unit, like some dryads. They're sweet at initiative 6, 2 attacks each! And they'd give their larger siblings in the treekin/treeman some company