Well-balanced (2,2,4,4)
I believe the answer is:
on an even keel
(Other definitions for on an even keel that I've seen before include "Running smoothly" , "(Going) calmly" , "In a stable condition" , "Well-balanced" , "Steady" .)
I believe the answer is:
on an even keel
(Other definitions for on an even keel that I've seen before include "Running smoothly" , "(Going) calmly" , "In a stable condition" , "Well-balanced" , "Steady" .)