just to defend the only gears i have...
Ninjas only have +30% HP from TGK.. Unlike Archer Class that has additional +20% HP, Merchants +15%hp, Super Novice with a huge +60%, Mages + 30%, Gunslinger(also a 1st job) +30% HP and StarGlad +30% hp
Also all of the above mentioned classes that has extra +hp% from the TGK, They all have Overweight Limit Lvl 10 from either the Rings or weapons..... I have to balanced my Stats resulting in the decrease of VIT which lowers the HP% which lowers the Damage Output.