Voidwalker with skull of dire ahamkara while in mid nova bomb, I use the skull of dire ahamkara in mayhem. A fist of havoc can too with unstoppable on. Last but not least, a sunsinger with radiant skin + ram (and max armor) or a sunsinger with fireborn + ram and max armor + armor from chest piece. The last two I'm not entirely sure about, but I'm pretty positive they work