this is the point, you really don't know that (unless you are a dev who has been testing all this) you don't know how quick these moves will use up mp, you don't know how much mp the absorb move will give you back, you don't know hww much more mp the absorb move will give you back when part of the combo.
we have always got on just fine with second wind, dps with litttle need for help off a mage for heals. so why do you assume our absorb won't work as well as second wind?