Yeah the range on it is 10M not 20M as stated in the description. It is definitely a raid spell, but because it doesn't survive the AE it would actually be useful for, it is basically pointless. You cast the tree on pull, the raid mob AEs, the tree dies. No healing to the group at all. And like Olrik said, you don't have the time to be casting the tree after the AE has landed, since you should be focusing on the MTs hp bar at that stage. The problem is easily fixed by making the tree immune to AE that's not specifically directed at it, and I don't know why the devs are dragging their feet on this.
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