I agree with 1 and 2.
For my own suggestion:
1. If shadi's number 1 and 2 suggestion gets implemented, keep the npc as it is because star gladiators are unique that they can do high damage to the jobs that are assigned to the hatred skills which is only 3, think of it that if you can reset the hatred skill you can kill all jobs so i disagree with shadi's number 3 suggestion.
2. if shadi's number 1 and 2 suggestion gets implemented, make a valk and legendary weapon when equipped the dispel skill won't remove the buffs like the rouge spirit, also in this case the star gladiator is equipping a weapon so the damage will not be like when weaponless so it will still be balance.