Why would the card need to be reworked? Because a Champion might try to make a Tanee Sleip? Look at the cost, 40% HP. That means for every 10k HP, he/she will lose 4k, assume a Champ runs near my build of 20k, thats a total of 8k loss , leaving your HP at 12k. 12k is NOTHING, and virtually no one can survive with 12k HP. Switching to Tao wouldn't do anything either since you will be raped by all attacks, no matter what element.
If you really want to rework the card, make it add 30% max SP for everyone and thats it. DI + DL combo adds 20% SP and HP; atleast Tanee would give the advantage of 10% more in sacrificing a shit load of HP.