Greater Link

The link between you and your eidolon is
stronger than most. Your eidolon’s current and maximum
hit point totals are not reduced by 50% until you are
separated by 110 feet or more. Your eidolon’s current and
maximum hit point totals are not reduced by 75% until
you are separated by 1,100 feet or more. All other aspects
of your life link class feature are unaffected.