Sacred Sacrifice will heal all your party members to full HP 4story Luna, but using this skill will leaving you an effect which you will die in 10 minutes after using it. You can remove the effect by using Panacea of Purification, you can get it from unsealing Goddess Tear that drops from monsters.
Sublime Pain is a great sacrifice skill to use in a Territory Wars. It will consume you HP by 6% to 4% per second depending on the skill level in 4Story. By using this skill, all your party members are Invincible to any attack except you and all your healing abilities are stopped, which mean your HP and MP will not recover.