Didn't see this posted anywhere. I find it handy. I am always changing to miner/botanist and immediately hitting Truth of Mountains and Forests. I like to keep both active, but that is optional.

Code:
/macroicon X gearset
/gearset change X
/wait 1
/ac "Truth of Mountains"
/wait 1
/ac "Truth of Forests"
Where X is the gearset number.
You can leave out the second Truth of if you don't care to keep both up.
Depending on your server lag, I think it is possible to remove the first wait state. Try it out yourself.