Controller keybinds

Hey,

I'm trying to set up to play with a controller on wow (console port with Asus ally) and would like any recommendations on how to keybind.

What buttons do you bind the main rotation to, defensives, utilities, map/mount, etc?

How would you go about binding druid forms?

Any help is welcome, the only guides I've seen are basically showing how to change the keybinds but not giving advice on what to bind to.

How have your experiences been with ranged classes? Are they as viable as melee?

Thanks in advance!!