Suggestion-Minor things that would make this game great

Hello, I'm going to make it short and quick. The purpose of this suggestion is to bring currently undesirable classes back into endgame play.

Aesthetics- Katana and great katana Saya when equipped but not in combat
Ability to permanently lock style so that it works while zoning.

Balancing:

Black mage- Short term, short duration percentage enmity transfer(In place of enmity douse which is currently useless)

Ninja- Rework the system of shadow removal so that Utsusemi is less susceptible to complete removal when an enemy uses Area of Effect spells.
Yonin- Add a component that reduces physical damage taken in the same way Fan Dance works
Merits-
Rework group 1 merits so that all -effects are in the same category and in Group 2
Rework Group 2 merits so that all -san spells share the same category.
Throwing weapon skills- Remove Sange as a merit in Group 2 and replace it with a merit weapon skill that works only with shurikens. Make it throw 5-10(Depending on shadows). Make it very high enmity.
Create 119 shurikens that are purchasable with plasm

Pet classes:

Reduce AoE damage taken from all sources by ~40%

Utsusemi- it was made that way for balance reasons, so it would be nice but I doubt they'll change it.
Yonin- breaks with ninja's design, ninjas main focus is to avoid damage, not mitigate it. So I don't agree with that.

Merits- will not happen, they want you to choose what to upgrade. Not that the upgrades are that significant in the first place... But, you also didn't suggest what to replace them with. They're not going to leave it with just 3 things in the group.

Throwing weapon skills have been discussed to death and basically confirmed by SE as never happening, so turning sange into a weapon skill will also never happen. We want it of course but it's already been asked about 3000 times.

item level shuriken can and absolutely should happen.

According to the devs, they are going to implement shuriken elements to ninja . Idk when, but it was stated earlier this month.

There is no way you can tank current content without getting hit so -pdt is not only desirable, it's necessary. The only thing ninja lacks is a decent enmity component to keep them in line with other viable tank jobs like a properly geared rune fencer,monk and paladin. While ninja will never fill the super tank role they can be viable for single target tanking though they take a great deal of skill to manipulate and people don't want to take a chance with a ninja potentially wiping an alliance. So they get left out of everything.

I was more interested in black mage as a viable alternative to ranger

The main problem nukes have in compare to ranger is simply enmity and MEVA. MEVA plays a large role just like enmity due to the fact a resist or uncapped land rate can destroy a BLMs DMG entirely.