Has SK ever done a JuggerMaw Comp?

SK has not done a Juggermaw comp, so the statistics show.

Kog'Maw was picked by CandyPanda in last year's EU Summer playoffs as well as Worlds, but the comps that Kog'Maw was played in was nothing like the Juggermaw comps you see now. The jungle picks were almost always either Lee Sin, Kha'Zix, or Rengar, and the support was generally the only one protecting the ADC. (Solo lane choices would usually be something like Swain/Ziggs or Maokai/Ahri, while the support was generally Morgana or, in the case of their game against Royal Club, Kayle.)

They'd never do a Juggermaw comp with Forg1ven, he generally doesn't play late-game hypercarries except the very odd Jinx / Trist pick.