I'm trying to describe a way to a goal that is more likely to succeed than any other ways, but definitely still uncertain. One word is optimal, but a few is fine too if the former doesn't exist.
Something like "This is the _______ path to victory".
I immediately thought of using "most likely" but calling something "most likely" makes it sounds almost certain, which is absolutely not what I want. "Best" sounds more suitable, but doesn't imply incertitude either.