I am not a great tank, but I do play WAR in solo content at times and this is the layout I came up with that works for me. Not updated for 7.0.

Lv60 Warrior Hotbars

Endwalker 90 Warrior

L2 + DP: Stance and Invuln

I use a mmo gaming mouse from razer called the Naga, the 3x4 grid is the exact layout as my mouse buttons. Hot bar 2 goes like this from left to right, top to bottom: 1, 2, 3, 4, Q, E, R, T, 5, -, =. The - and = are left and right on my mouse wheel, 5 is reserved for long cooldowns. Hot bar 3 is the same as 2 but with shift being held. The empty item between Tomahawk and Holmgang is a health Pot

Maximum movement hotbars. Most common/important ability on face button. Gropued by sections: Defensives, Final combo GCDs + 25 sec, Tank functions, AOE, gap closers and range attack ect.

Hotbar 1: The good ol 1-2-3 combo on top, then the single + AoE oGCDs along the right side, then the legacy spot for Sprint. Next row down is AoE 1-2 combo. Then next row is the ranged and gap close, which thankfully still works as a free damage button in 7.0. Then the two bursties.

Hotbar 2 (ctrl): A few oddities in here. Top left is the burst hitter. Next is technically the alternative 3 in the 1-2-3 combo, since it felt more fluent to press 1, 2, ctrl+2. Next is the single-target spender. This was just built on the rotations as I leveled up and placed these actions accordingly. On row 2, bloodwhetting and the AoE spender just had to be neighbours. Row 3 has the job-specific mitigations, although now that I re-read the tooltip, Thrill and Bloodwhetting could be great vertical neighbours. Row 4 has the straight up heal, low recast time shield-a-friend, and team shield.

This is a separate cross hotbar for single target and aoe. Hope you enjoy! :)

How I set up my crossbars as a warrior on steamdeck (Currently level ~65)

I try to play every classes/jobs, thus I tend to reuse same slots for same "functionality" across jobs.

MMO mouse setup with modifiers.

Single target on RT + face buttons, AOE on LT + face buttons

Damage mitigation on LT + D pad, barriers and healing on double LT + face buttons

RB toggles between 1 and 8 for AOE

Peripherals are Corsair Scimitar Elite

All jobs will follow a similar pattern to make job transitioning simple and not so overwhelming