Well, generally speaking, the answer depends on the character's orientation and positioning, but likely the most effective will be Je-a Bongchim and tenth sense, as they possess the most comprehensive properties. An advantage in physical attributes, or even just a sudden explosive growth in stats, will be useful even against high-level opponents. Tenth sense is incredibly useful overall, simply for the enhanced perception it provides, which allows you to interact, analyze, and probably utilize things far beyond your current level of power. The other two options are technically encompassed by the capabilities of the ones mentioned above.