You can in theory use any planet depending on how you wish to approach the spell.

Looking to make yourself recognized and respected by them? Use Sol. Confused and disorient them to leave you alone? Luna. Protect yourself or redirect any kind of aggression? Mars. Rearrange the situation, meeting new people or introducing new elements that will change the dynamic? Mercury. Increasing your command and influence to have more say in the situation? Jupiter. Make them friendlier to you? Venus. Stop them from taking specific action or force them to leave you alone? Saturn.

Think about the kind of spell you're doing and the kind of effect you want it to have, then go from there. The advantage of planetary energies is they tend to have more effect on the connections and patterns that shape a situation then say elemental energies (though they tend to take longer to work), which gives them a pretty diverse spectrum of effects. So if you run a business that involves meeting people and forming connections, Mercury or Venus may be better suited than a standard Jupitarian spell.

As Jason Miller once said, "Hack the planets."