Why get relaunch at all?
Cut down does a lot more damage and aoe re-launches enemies.
Also, the buffs should only be considered after Jester skills are finished. They don't add much and tend to eat precious skill points you need when using your Jester.
I would also argue that 5/5 aerial frenzy is not necessary as a Jester but is quite useful as a thief. 1/5 is really all you need as a Jester since you'll only use it for quick combo points anyway.
Mabinogi - Ruairi ch5 - Spliff