I am surprise Lily's don't get invincibility like other class skill other than guillotine. Carnage has very long animation and is a melee skill. You have to tank all damage until you finish all 10 hits. That's why though out my leveling to level 55, I witness Lily's death much often than other class, highest death rate. Most of her skill are melee and has longer animation. You need to trade dodging boss hit at expense of your dps while other class can snipe their skill twice the time than Lily's.
If you want make Lily so friendly with Grim Reaper, then makes the Grim Reaper revive Lily as a skill



for when your cooldown reduction is low.