Are Gunners bossing classes?

Warriors are also slow but they don't get any extra speed boosters
Hermits have low HP and survivability but they don't have HP+ skills
Bowmen aren't very mobile but they don't have their own movement booster.
(Thrust does not count, no one gets it)

What I'm trying to say is that instead of feeding the complementary skill to the one who needs it, give the complementary skill to an opposite class so they can work together in a party instead of going LOL U HAV NO PARTY SKIL I HAV IT AL SO LOL@U.

Also, when you're in battleship, you don't take any damage, your battleship does. I'm not sure exactly how much HP the battleship has.

But then that would kind of involve sacrificing a party slot for the gunslinger, when the spot could be given to an NL, BM, bishop, Drk, etc. which is very crucial for bossing.