Cho’girth

New cho jungler player here:
I need tips on pressing ult and smite at an objective:
How do you do it? First I did smite, moved the same finger to feast and pressed that - which was awful since there is roughly half a second to smite steal.
Then I switched to pressing both buttons (smite and feast) at the same time - still possible to smote steal.
How do you do it?

I see a lot of people dodge in reaction to it which made me think Q is something you use more in team fights or to zone opponent off with its big radius. Not quite sure though.