It seems that as part of the Melding Update, the One with Nature racial power shared by Elfen and Faelings has been silently nerfed. It now no longer applies to rooms that have been terrained by druids. This dramatically reduces its strength and utility, so I think it's time to again consider some alternative ideas to replace One with Nature for Elfen, Faelings or both.
Some of the ideas I've floated in the past include a power allowing the use of Mystic Pathways, but I think that more direct combat utility is favored for these. There was another thread on the subject back when the Racial Overhaul was newer that I'll be scraping for ideas, but the context has changed a fair bit since then so we'll see.