Healing Bolt is a projectile spell that adds 8.75 per hit, which can be multiplied by Berserkium, or the perks Glass Cannon or Living on the Edge in order to obtain greater healing.
It has 20 charges, and is not affected by the Unlimited Spells perk. Like any limited use spell, however, it can be cast with a Greek letter spell such as Alpha or Gamma, or any other method of preventing charge reduction such as Wand Refresh can be used to bypass that limit.
A pool of water (or other safe liquids) could also be used to slow down the projectile enough so that when aimed upward, you can simply swim up into it.
This method requires no spells or perks other than Healing Bolt.
Boomerang (the spell): Projectiles will return to you and heal you.
Accelerative Homing: Less effective than Boomerang, but by standing on a harmless enemy such as a Holy Mountain statue, a Parantajahiisi, or an enemy whose only attacks you have an immunity perk against, the Healing Bolt will immediately turn around and heal you.
Trigger/Timer: When triggered by another spell you can be hit by the projectile and heal yourself. Can be somewhat unreliable depending on the angle however.
Teleport Bolt: Teleporting in front of the projectile after it is cast can cause the projectile to hit you and heal you.
Necromancy: Allied corpses created through necromancy can hold and use wands. If the spell would cast Heal Projectile the corpse will aim at you and attempt to heal you. (Note: Drop wands by opening your wand inventory and dragging the wand out of the hotbar in the upper left corner of the screen.)
Berserkium: Doubles the healing caused by the spell.
Fly Downwards and Fly Upwards can both be used to heal yourself easily, given enough vertical distance.
Holding Kuu provides another unique way of redirecting the healing bolt directly to you if a large enough body of water is not available.
This is risky however, as you have to have really good timing or slower projectiles to properly redirect.
Piercing Shot: can allow the bolt to affect you multiple times. Combine with Increase Lifetime and Boomerang to allow the spell to heal significantly, Piercing also makes the projectile not expire upon touching the ground, allowing for very powerful healing by simply shooting the projectile at the ground.
Floating Arc: Allows you to shoot downwards towards the ground and have the bolt float above it, letting you land on the projectile.
Larpa modifiers can create copies of this spell that fly towards your direction and heal you, though it may be unreliable depending on the type of Larpa modifier. Downwards Larpa works especially well if fired directly upwards, which creates a rain of healing bolts (best in an area with a large open space above your head.)
Bounce: spell or perk will indeed bounce a healing bolt off a wall back at you.
Orbiting Arc: circles near cast, short jump to get to the healing bolt.
Black Hole: The black hole attracts the healing orbs and drags them along its path, allowing you to follow it if casting all of them simultaneously.
Summon tentacle with timer: When in the payload of summon tentacle with timer, the initial velocity of healing bolt will be zero, making it easier to heal.
Ping-Pong Path: Fire straight up, then fly up into the bolt.
Divide By: Dividing Healing Bolt can greatly multiply the healing effect, and since Divide By removes projectile damage, this can also be used to counteract the negative effect of added damage from modifiers and perks.
Anti-Synergies
Projectile modifiers that increase damage such as Damage Plus will deal damage rather than healing as the spell deals healing damage and not projectile damage normally.
Concentrated Spells perk: it adds projectile damage to each cast including healing bolt. This anti-synergy can kill you instantly if it's combined with Piercing Shot and the Boomerang spell.
However, using greek letter spells like Alpha, Gamma or Omega can nullify the damage and heal you instead. Only direct casts of Healing Bolt can do harm to you, since the Concentrated Spells perk targets only projectiles and static projectiles specifically ("other" and "utility" type spells are not affected).
Boomerang Spells perk: it adds projectile damage and will actually deal damage to you.
This can be solved with using Piercing Shot, and by shooting at the ground (from a slight distance) and walking into the bolt.
Tips
A unique way of getting yourself healed by this projectile is to trick an enemy into casting it. Drop a wand filled with only this spell to the ground (click and drag for mouse users) and a humanoid enemy may pick it up and attempt to 'attack' you with it, resulting in you being healed. Beware - enemies will still occasionally use their standard wandless attack even when they are wielding a wand, so be attentive and stay ready to dodge.
per hit, which can be multiplied by Berserkium, or the perks Glass Cannon or Living on the Edge in order to obtain greater healing.
