Yoshi P? Your bias is showing

[Gserpent]

What? Pretty sure Thunder + bunshing + mug will deal much much much more damage than the dot. Nin dots are pretty pathetic and their direct single target isn't even top. Literally every other melee can do more burst than Nin. Stealth is also garbage in ff14 for it actually be reliable.

Goka total damage is 20k (4k initial plus 4 ticks of 4k each), vs 16k for Hyosho. Mug would increase both by 10%, regardless. You use Hyosho when you need burst, you use Goka when you don't (or when the other is sealed and you want to use both.)

Stealth sucks for actually escaping, but it lasts long enough to get the Assassinate off pretty much no matter what, and Shukuchi is still a long ranged point-target movement tool regardless of the stealth. The stealth will still break targeting, too. You mostly only use Hide for initiating, not escaping, due to the "Vanish bug" issue. But it's fine, Shukuchi would probably actually need to be nerfed to 20 or 25 sec if Hide was actually reliable for escaping.

You are correct that NIN has the lowest damage of any melee, though. It's why they're so slippery and have such a versatile kit - you're trading raw power for versatility. It's also why it's so important that their ultimate has the Execute function - NIN actually lacks kill potential without it.