Not only test chests but I would love to see an Oryx and O2 buff in health. Sometimes you don’t have time to even connect and reach the boss that is already almost dead.
Real problem with test chests is: You can leech all the boss, just move when he is dead with a wizard with EP, ninja with sullen or warrior with pixie/dblade. And leave some of the ones that did most damage to the boss without drop.