DRK - Teach me when/how/where/why to use The Blackest Night

[Mekhana]

Abyssal Drain in 9/10 times without Dark Arts is a waste except for very rare ocasions.

Basically you want to Dark Arts everything except Syphon Strike unless your MP is full and your MP should be never full, ever unless you haven't pulled yet.

As for Carve and Spit, DAing or not is situational. The DPS is nice but the instant MP gain is too good to pass up. Generally only mandatory in burn phases or when OTing.

As for TBN, you generally want to use it all the time whenever its up as long you are actively taking damage. Unless there's a buster or any other heavy dmg incoming or if your blood gauge is full.

Sometimes things will die too quickly or get stunned, meaning you might not proc the blood gauge increase. Comes with the job really, taking less dmg and allowing the healer to dps more/have less to do is always appreciated and makes you look good.