Why do Bards have the highest DPS?

[Genjisamurai]

Don't forget to factor in that Bards also have access to enough damage boosting skills to increase damage constantly by cycling between them: Raging Strikes increases dmg by 20% for 20 seconds, Internal Release increases crit rate by 30% for 15 seconds, and Blood for Blood increases dmg by 20% for 20 seconds but also increases damage taken by 25%.

Yeah but who the hell has all those up at once? Plus the cool down. I dont even bother with blood for blood.