Netzach in Tiferet - eternity and victory, even ego, in balanced harmony.
I usually default to selflessness when thinking about achieving balance. Call it a corrective to the notion that I have been less caring about others in the past.
Still, self-care, self-protection, and even an appropriate degree of self-interest help balance any evaluation, when we want our part to be successful too.
Include reasonable self-concern when aiming for long term success.