My support falls with Leaf Guard for Embirch. It simply fits the idea of a defensive ability while showing an evolution into the armor worn by it's future forms. Something I think could be interesting is if we gave Flarelm Weak Armor. This could further the idea of the armor strengthening with time, which frankly I like.
I want to say I get more stupid everyday, but it would make me stupid to admit that... Irony...