The Sealed Dagger: A Ninja Guide

Malignance is great, but its lack of Def and MDB in particular make it a liability in some fights.

Namely sortie basement bosses, Bumba, some other V25s.

In those fights you need a couple pieces that are heavier on the def/MDB side. Previously that was only Nyame and you take the hit on DPS because you need it to survive.

The new gear gives you an option that is very heavy on Def/MDB and still great dps wise on top of that.

When are you using nin in any fight like that is a different question.

Not sure what you mean. Nyame has exactly the same MDB as Malignance..

And Revelation set has stunning 1MDB more..

That is one of the two things I mentioned. The other you ignored.

Because other things I mentioned myself and they are correct, why would I mention them, when I wanted to question incorrect stuff.

You suggested Nyame has higher MDB, Revelation is very heavy on MDB and Malignance lacks MDB. So it's 1MDB that makes set lacks MDB to being very heavy on MDB. Interesting.

Most modern moves are magical in nature, so defense as a stat is technically "worth less" than magic defense or magic evasion collectively. Besides melee hits, probably the most significant defensive stats you can rely on are magical ones (doesn't mean DEF is worthless). If moves are physical in nature where defense matters, at least for Ninja, utsusemi provides protection so it's less pertinent than for other jobs.

Here are the links, compare and judge.

Revelation also has a lot more hp, and stats. Whether that matters to you is a personal choice I guess.

Just wait for lolDDwhm with Sworn and Ampulla having over 800meva, 50%DT, 34%ta and 100%DA in a tp set :)

It's not a matter of subjective opinion. Revelation is weak against debuffs and mediocre against resistsable magic damage. It's good against pure physical damage. Meaning you will need to hot swap it to high meva pieces during many fights. Malignance can be worn full time without issue.
Malignance is better hybrid tp piece. Revelation is better tp pieces.