4th job Single Target DPS

Please, tell me these advantages, because I see none. Absolutely none. What can Vipers do that no other can?

Well i didn't say that vipers can do things that NO OTHER class could EVER do, but...

1) Can fight pap exclusively on 1.3x.
2) Mob up a platform faster than any class. Warriors being the only class with mob movement skills that compare, but buccaneers do it while doing more damage and 3 mob movement skills used for completely different reasons > 2 that are used practically with no real difference in the end result.
3) Fight bosses with controlled/minimal pot usage regardless of funding. Thieves i guess being the only one to compare, but they do it through sheer luck with their avoid rather than invincibility frames (b-step excluded). This is something every single other class pretty much cannot do but it depends on the boss at the same time.
4) We have more skills whose use depend entirely on the kind of situation we are in than any other class, which grant us a lot of advantages in the weirdest of ways.
5) Longest invincibility combo of any class. Barrage into demolition grants at least 5 seconds of complete invincibility from any attack except seduce, which no one can defend against atm.
6) Have skills that heal both HP and MP and can be used more often than other recovery skills, and in the case of drain also do more damage. Passively healing HP is ok, but i and others would rather have an attack as awesome as drain than the only other alternative to drain which would probably be passively healing HP based on damage while energy is up. Drain helps a s'hit ton at BGB who constantly drains MP, so when i'm out of ST i can stand on him and spam drain and avoid MP drain while healing HP at the same time. I could even take the MP drain and still spam drain because it doesn't cost MP to use. Aurora (evan healing) isn't quite as reliable since it has a cooldown and is position based.