Need sugguestions for ideal mouse buttons

What actions should be assigned to the mouse buttons.

I currently have:

Trinkets
Moving DPS
Long Term DPS
AutoRun

I have the default left/right click.
And use two thumb mouse buttons (mouse 4 and mouse 5).

The further back button (closer to my palm) is set to FTL Follow Me.
The more forward button varies with team:
- Priests.. Holy Nova
- Ferals.. Nostance = Cat Form; Stance:3 = Prowl
Have not set that button for other teams yet.

I'd recommand an "oh shit" button, like pvptrink for pvp, last stand or so for warrtank etc. That's what i like. Something you want to use quickly when you need it. Taunt is a nice one aswell..

I have one of my buttons as my most often used non-attack button (Life-tap/Stealth/Water shield, and likely when I get the priests there: Shadow-form).

Another is my oh shit button: (Healthstone/ Potion/ Battlemaster trinket/ Lifebloom/ Parachute)

Next is my silence/interrupt button (Spell lock/ wind shear)

And auto-run, along with the regular right and left clicks. I dont use the middle mouse button for much.

Oh, I also have my push to talk button on my mouse.