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

MMO mouse setup with modifiers.

Keybinds for those interested.

I use an mmo mouse so 1-6 on all bars are pressed on the mouse, uisng shift and ctrl for bar 2 and 3. The latter 6 on all bars are pressed uisng the keyboard and shift/ctrl.

Based on Squintina's layout, but with tweaks that fit my brain better. ST on chotbar 1, AoE on chotbar 2. I hit R1 (right bumper) to change to the AoE and sit on that chotbar as needed. Since RDM is my Eureka job, I have Eureka Potion set to chotbar 3, LDU.

this layout works for levelling from RDM unlock through Dawntrail. main crossbar is your single target spells & burst rotation, and the 2nd has your AOE spells

The VerHotbar

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

Hotbars for Lv60 Red Mage.

First attempt to make panels for MMO mouse with 2 3x4 hotbars and 1 6x2 for utility

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.

Lvl 100 Red Mage XHB made by a ps5 player

I created my chotbars to be comfortable, practical, and aesthetic.(to me anyway) Nearly all same/similar skills are in the same position across all jobs/roles while allowing for as little finger gymnastics as possible.

My XHB is split between chotbars 2(left) and 7(right)