The ring Bursting decay gives 3% of maximum life as physical damag with the drawback that you lose 5% of maximum health per second, given that the lich ascendancy can make your life unable to be changed if you have energy shield you can avoid this effect.
Seems like it may be possible to make a build with this, probably lightning based whether it be spears or bow seems to be the most reasonable to me. Anyone got any ideas?