This skill offers a weaker version of necromancers passive "reusable parts" in update 34 patch notes the dev notes stated they want to avoid having abilities sharing the "exact same function".  While the 15% is nice and ok it doesn't offer anything new to the necromancer that they don't have and also makes a skill that pertains only to another skill. If your neither a tank nor summoner but want sone survival this doesnt do anything more than its per morph version.
Alot of the orginal skills for necro were very interesting, taste of life seem to focus on soul magic like the necromancer of Namira's cult. With that in mind...
Accept Namira's blessing, wrapping yourself in Ebon bone, granting you Major Resolve, increasing your Physical Resistance and Spell Resistance by 5948 for 20 seconds.
When you take damage, you create a cursed tether that grants tast of life for 6 seconds to the attacker. While the tether holds 5% of your damge taken is transferred to the target. The teather breaks if the enemy moves further than 8 meters away or the armor is removed. This effect can occur up to 6 times and only once every 3 seconds
While active, reduce the cost of Blastbones, Skeletal Mage, and Spirit Mender by 15% and creates a corpse when the effect completes.               
                              "The Tower touches all the mantles of Heaven and by its apex one can be as he will. Be as he was and yet changed for all else on that path for those that walk after. This is [CHIM] the secret of how mortals become makers, and makers back to mortals."