In an EXP pt, you won't be triggering anything. Your role as a BLM will be crowd control, magic DD and azure light building (kill a mob with magic).
When it comes to killing NMs though, your role will most likely be to trigger Yellow!!, Stun, and damage. Most every NM will have a Yellow!! weakness (not sure about roaming avatars), but sometimes Yellow!! is pointless (Piasa for example).
Yellow!! is predetermined by the day that you pop/claim the NM on. It will always be a spell of the element that is Today, Yesterday, and Tomorrow.
Elemental spells fall under: Tier 3. Tier 4. AM1. Tier 3 AGA. Dark spells are Drain, Aspir, Bio2, Dispel.
So if it was Firesday, Yellow!! could be: Fire 3, Fire 4, Firaga 3, Flare. Stone 3, Stone 4, Stonega 3, Quake. Dispel, Drain, Aspir, Bio 2.
There is a chance it could be none of those, which means it's either a Song, Blue Magic, or Ninjutsu. Lightsday is also a hassle for us, as you'd need to /WHM to access a few of those spells.
In order for a spell to proc, it has to land when: The NM is NOT casting a spell, charging a TP move, during TP move animation, Stunned/Terrored, or under another weakness effect (amnesia from blue!!). So don't toss out stun randomly!
Can be problematic for NMs that like to spam spells/TP moves. /SCH is great for Alacrity AM1 if your party is fine on healing. Certain NMs can't be proc'd during 2hr effects. For Dispel, you have to land it unresisted. If the chatlog says "No effect", it still counts as landing unresisted.
As to when to proc, if you're not sure, ask your leader. Sometimes parties/alliances want to prioritize Red/Blue!! beforehand. Other times, parties will only want Yellow!! (seal NMs)
BLM, RDM, SCH, COR 90
-Midgardsormr -> Quetzacoatl-