Turn 8's enrage is a single hit, Atomic Ray, that wipes the party. The first few clears of T8 intentionally exploited the game to avoid it. There's several ways they could've done it. I personally think it was a Z-Axis exploit (ie, they found some way to knock themselves above the battlefield and thereby avoid Atomic Ray) but any method they did it would've involved taking advantage of an unintended exploit. There is nothing unintended about T2. Globe 199 works exactly as designed and parties aren't avoiding the attack entirely. They're just healing through it. And that's totally fine.