Dynamis Procing

Dynamis Weakness Trigger Conditions

Enemy job: RNG THF MNK BST NIN - JOB ABILITY / Any enemy-targetable ability or physical Blood Pact: Rage, except pet commands and possibly Ventriloquy.

Enemy job: PLD WAR SAM DRG DRK - Any WEAPON SKILL and some Puppetmaster Maneuvers, possibly based on current Automaton frame's deciding maneuvers for Weapon Skills

Enemy job: WHM BLM SMN BRD RDM - MAGIC / Any magical Blood Pact: Rage or enemy-targeted spell with the possible exception of cures and Odin.

You are able to proc during an enemy's 2 hour ability, it seems you can also proc during spell casting

The number of Time Extensions obtained affect your proc rate:

0-2 ~> None
3 ~> Low proc rate / Blue - Potentially transient Amnesia, or nothing.
4 ~> Medium proc rate / Yellow - Terror/Stops 2-Hour/Able to Re-use 2-Hour
5 ~> High proc rate / Red - Terror/Stops 2-Hour/Unable to Re-use 2-Hour