What's with all these people single-targetting during big pulls in dungeons?

[JunseiKei]

Alright, since you're knowledgeable on this, wonder if I can pick your brain on RDM specifically. What I was advised to do was use Scatter followed by Verthunder/Veraero (to allow for the Verflare/Verholy if you get to a single target, such as a boss, for when you need to melee). But in doing so, I've found I'm often proccing Verfire/Verstone Ready. Is the best option to allow the buff to drop, or should you keep weaving them in? Currently, to account for what I think is a mild OCD, I've been using the procs (which makes Impactful a pain in the backside). But would it be better to do the one, and then follow it up with basic Scatter spam and allowing the buffs to drop if it comes down to it? Or is it better to use the procs to allow for faster generation of Black/White mana, for more melee AoE combos? This is where I really fall apart with RDM.

Forgive me for butting in.

Generally speaking, just spamming Scatter is enough. While you get the same potency using Scatter and VerAero/VerThunder, you'll spend more overall time on the mobs alternating between single target and AoE spells. Using VerHoly and VerFlare is a DPS loss compared to Enchanted Moulinet (550 versus 200(*). You switch to AoE rotation at 3 targets for RDM, so that'd make the potency 600). You might gain white and black magic faster using scatter into single target, but you gain time on targets.

From how I understood it when I thought about what you were advised and assuming gauge is at 0:
Scatter + scatter = 600 potency + 6 white AND black mana (discounting 25% proc)
Scatter+ VerAero/Thunder = 600 potency + 3 white AND black + 11 to white OR black
Enchanted Moulinet at 30/30 mana.
Double scatter would take 5 GCDs. Scatter + single target takes 4 GCDs because of needing both mana at 30.
Using your procs, Verstone or Verfire, results in a DPS loss of 30 and only a mana gain of 3 over double scatter.
Accounting for Enhanced Scatter, you can gain enough mana for Moulinet anywhere between 3 GCDs or 5 GCDs. Yay for RNG~

With me, I keep the enmity/enemy list open so I can always see each add's HP levels. As soon as I see the 3 final mobs down to low levels, I start doing single target and will hold off using Moulinet, even if I'm already at 3x/3x.