It's difficult not to ruby when someone else/others drop the mob's HP down from another WS right before you do your own. It ends up being not WSing at all relying on DoT to not upset lights or compete trying to WS before others do theirs. This doesn't apply to if you're trying to solo your own unless others attack it. Just my 2cents to defend empyrean/relic/mythic users. Though most jobs can throw out huge damage with the right atmas and WS inside abyssea without empyrean/relic/mythic.