UI Question: How many visible action buttons/slots do you need?

[MadMilitia]

I have a 6X6 bartender grid I keep on the left and a 4X3 grid on the right for healing.

The bartender grid right-most side is all rotations and CC. I'm a lefty so my keybinds are all on the left side.

The bartender grid looks like this:



The right-most side is rotation and CC. Top to bottom, left to right is:
DPS AE, DPS ST
Loot-A-Rang, DPS SV
Taunt Focus, Taunt Target
Interrupt Focus, Interrupt Target
Stun Focus, Stun Target
Grip Focus, Grip Target

The inner bar is just filled with cooldowns. I need to clean that one up.
The inner left bar is professions and some other important things.
The leftmost stuff is for consumables I need and bags.

Then on the right I have the grid layout. I use keypad healing something I've discussed before on here. It looks like this:



This setup completely maps to the numpad. Where The first DK on the bottom is NumPad 0 and the last Warlock is NumPad 9.
On that healing pad I do several things.

X = HEAL (Standard)
ALT + X = HEAL (Emergency and Wall)
SHIFT + X = HEAL (AoE)
ALT + SHIFT + X = Dispel
CTRL + X = window swap.

Where X is the numpad button I pressed.

Then I have an IsBoxer toggle set (Work in Progress) that shows the status of my keymap swaps. Like if I wanted AoE instead of single target attacks. It looks like this:



Again badly butchered right now as I'm moving a lot of stuff and changing the way some of them work. They illuminate different colors when I change state. For example the blue one is the camera view toggle. It goes from 1, to 2, to 3 and the icon on the toggle changes with every one. So I know what the current camera angle should be.

These toggles though are:
Standard Keymap toggle, standard broadcast, local rotation (to pass-thru rotation to current window), camera, ST / AoE toggle (turns green when AoE), IWT (red off, purple melee only, green all)
Targeting(SAFE, PvP, PvE), Invisible (follow ranged), invisible (follow all), TAB (to include TAB in the rotation or not), Raid Events (I have a huge list of raid priority targets in WoW macros I fire off when this one is enabled), Combat Follow (slaves will follow master in combat when they have no harmful target, some WoW macro magic there).

Anyway that's my entire layout. Still working on some stuff. Incredibly after all these years =D