New TFT Strat

So i found this in a match I lost every pvp round of up until I had 10 hp left. This idea let me win against two people that were at 70 and 50~ without losing another match. I'm calling it Undying Kassadin until I can think of a better name.

Kassadin with Rageblade, Phantom Dancer, and Dragon's Claw. Pick any two frontline champs, have two other void members, pick literally anything else for the rest of your team, sit back and watch as Kassadin slowly tears through the enemy team stacking his shield and stopping whatever poor sod he's targeting from being of any benefit to the team besides aggro duty. The only counters I've seen so far include any type of cc that lasts a significant amount of time or spirit debuff.

Was this a fluke, or did I stumble upon something completely busted?

Edit: Maybe I'm just gonna go with the more obvious Kassawin.