>>46522772If you really want to buff Lilligant even if it doesn't make a ton of sense: Power Gem (or any Special Rock Move) would be incredible. It would cover its Flying, Bug, Fire, and Ice weaknesses while also giving it more coverage besides Grass & Bug. Still it really doesn't make a ton of sense as Lilligant doesn't really have any gem's naturally on its body (which is why Nature Power is the way it uses it). The alternative would be Earth Power, ground coverage covers Poison and Fire types.
A fairy move like Moonblast while neat would really not help as much, especially without STAB.