AV Solo'd!

...or you play like you have a brain and hop out of the aggro knot (yay CJ) and kite until the cascade fades.

I do this sort of thing against the Cimmy's all the time on my WP toons. Invuln actually has enough DDR (and hit points) that I usually solve cascade failures via a pile of 'dead' bad guys.

Designing for edge conditions can get you strange things, and capping all defenses is a worthy goal. The last few percents counts the most.

Of course, the toon would be godlike either way, to be honest. I just like the idea of rock-solid, destroy all in path, badass toons without a single purple. The current bidding frenzy on purples is frankly ridiculous, they simply aren't worth it.