This Combat Art is very useful for any Seraphim at the beginning of the game (even unmodded and even without Celestial Lore or Celestial Focus) as it can replace health potions. This will free up space in a player's inventory or let them accumulate health potions faster.
An effective way to use this spell is to use the bronze mod Recuperation, as it will boost the player's regeneration of health points significantly, transforming it into a HoT (heal over time) effect. Health will be maintained at 100% when taking damage for as long as the effect lasts (10 seconds). This modification will also stack, a considerable benefit. If cast subsequently before the effect of previous casts have ended, the stacking effect will allow for a very large healing effect. Note that this has been changed (nerfed) in Ice and Blood, and the Recuperation mod now heals 10% of the amount directly healed by the CA, per second of duration.
A useful way to take advantage of this ability is to precast the spell just before entering combat. If a player knows in advance that a large amount of damage may be incurred, for the next ten seconds, the player's health will be healed to full. Players must remember to recast the spell each ten seconds to keep up the heal over time, or the spell will lapse, leaving the player more vulnerable to damage.
The silver mod Master Healer significantly reduces regeneration time of this combat art, allowing it to be raised higher for the same regeneration as before choosing this mod, and healing a larger amount and with the recuperation mod, healing more hit points per second during the 10 seconds it lasts.
On quests where a player has an NPC traveling with them, it is possible to heal the NPC with this Combat Art, therefore making the task of keeping the NPC alive much easier. As of Ice and Blood, you have to target the NPC now for this, otherwise it will be cast on yourself.
Pros and Cons
A real lifesaver in many situations
When modded with Recuperation, may void the necessity to use health potions
Can make a player reckless very easily
Certain bosses and champions have the ability to remove the Recuperation buff effect