It's completely delusional to vote for a third party candidate in the US election system. The chance of winning is 0%. It won't happen. Absolutely impossible. The only thing it does is strengthen the candidate with the more committed voter base or in other words: the republican candidate.
If you had ranked choice voting or the president was elected by a parliament that is elected by proportional vote like in most of Europe, that wouldn't be a problem. It's not like that though. If you vote third party in the US, all you accomplish is making a Trump victory more likely.