You can run 3x Boomkin and play like almost any ranged composition.
Basically use follow, line your guys up near maximum range.
And start your nukes.

If you're questing, 90% of the time 2x Wrath volleys or 1x Starfire volley will kill things outright.
That is from a 5x Druid perspective, so 3x might need an extra volley or so.





The other approach is going Feral.

In cat form, you'd want a simple castsequence for (reset=target) Mangle, Rake, Mangle, Mangle, Rip.
You'll basically kill almost everything, before the sequence finishes.

Feral imo is a lot more fun, because it is different from being a caster.
And almost everything else is leveled as a caster type.

It does require one extra mechanic.
You need Click to Move enabled.
And you need to add in Interact With Target, to the keys that you spam.