i use this daily against pandaren trainers' aquatic pets. as a flyer with a decent speed, it almost always goes first. when its heath dips low enough to lose the flyer speed bonus, you can use rush
to maintain initiative. lift-off
gives it great strategic avoidance, and high damage against aquatics.
vs wastewalker shu's crab (crusher)
vs flowing pandaran spirit's fish (marley) and water elemental
vs seeker zusshi's water strider (skimmer)
vs aki's otter (whiskers)
strategy: use peck until "bad stuff" is about to happen (e.g. last round of whirlpool, 2nd round of pump or dive), then use liftoff to avoid the the damage, and smack them on the head next turn. if you ever get low enough on health to lose initiative, use rush to make sure you can get your liftoff going first when you need it.
if you prefer a more offensive play style, using reckless strike
instead of liftoff gives you the WHUMP you need to get through pesky turtle shields & heals before falling asleep (useful for hyuna & moruk)