if I recall rightly the druid epic is a DoT.
I assume you can click it manually to trigger it? Does it have to be Equipped to be used there? (unfamiliar with the rules on TLP)
I would assume you could always set it to trigger through MQ2Melee using a holyshit, something like
Rich (BB code):
holyshit1=/if (${Me.ItemReady[Nature Walkers Scimitar]} && ${Target.Distance}<100 && ${Target.PctHPs}<98 && !{Me.Moving}) /useitem "Nature Walkers Scimitar"