I have my hotbars set up so that pressing R1 toggles between hotbars 1 and 2, with hotbar 3 as the WXHB.

"1" icon is Aether Compass, "2" icon is Gysahl Greens.

Pot goes on Bar 3 Down D-Pad Raise uses Macro

RDM as of 6.5

I show Cross Hotbar 3 (Left) with both of the expanded trigger controls, so you can easily add in another 8 actions if you prefer, I use XHB 8 as a shared bar between all classes for traversal and general actions outside of combat. Role actions are consistent among my layouts, and so are general actions. The macro icon is a placeholder for a Tincture/Gemdraught.

Hotbar 1: White mana on the left side, black mana on the right side. Single target above, AoEs below. Both/neutral down the middle. I used to put acceleration on Hotbar 3, but it's better this way for quick succession to the relevant actions.

Hotbar 2 (ctrl): The 1-2-3 melee combo on top. I usually have my gap close/make on those two middle positions. Sleep, lucid, cure, and the DPS buff are just rollovers from my old hotbar as Summoner, my first job, and that was before I put more thought into hotbar setups. AoE and run+gun spenders on the bottom row.

Updated for Dawntrail

Buttons consistent for similar job actions (Dye = Potion)

MMO mouse setup with modifiers.

Just copied Nanaki's

Lvl 100 Red Mage XHB made by a ps5 player

Hotbars for Lv60 Red Mage.

Thought Process

• melee and spells separated
• Tried to place ogcds near their rotation/burst gcds (e.g. embolden near melee combo, pot near spells for opener, etc)
• Fleche and C6 duplicated to make drifting harder
• spell relevant actions near spells (e.g. lucid, instants)
• macro icon is placeholder for pots
• Expanded XHB on HB 2 shared with WXHB to see cooldowns, use whichever you feel comfortable using. I just think double tapping is annoying :)

for each job, I create a "hotbar" that is basically a monitor for cooldowns/any spell/skill I want to see the status of; I also have a hotbar with Role spells & skills, and, Sprint. I would add Second Wind in the missing slot. I use Hotbars 2 & 10 but you can use any Hotbars you want.

for RDM, there are only 6 spells, so you could put them all on 1 column; I don't do this because of how I have my UI setup to accommodate multiple job setups.

Black is right, white is left. there's still a lot of flexibility here, but this is more or less what works for me