idiom · to benefit from both sides; to maneuver skillfully in social or political situations for personal gain

他在两个派系之间左右逢源，试图捞取各种好处。

idiom · to have everything going one's way; to handle matters with ease and find success in any endeavor

他在学术界深耕多年，研究起来左右逢源，得心应手。