Healer

Level 1 & 2	Level 3 & 4

Introduction :

The healer is a flying unit. 

She is the only troop with no attacking/offensive capability, but can heal any ground troops, except when she is defending as a clan castle troop (in which case she heals damaged buildings, clan castle defensive troops, and heroes).

When the Healer is deployed, a pulsating circular aura appears around her. If all units have full health, she will start healing the closest troops (although it will have no effect on the healed troop(s)).

When ground troops take damage from the defenses she will fly over and start healing. 

Healers will not heal flying units which include :  healers, dragons, balloons, minions or itself,  unlike a healing spell,  which heals every kind of troop.

Although healers have no favorite target, as of the September 16, 2014 update healers now prioritize healing larger group of  your troops.

Offensive Strategy :

A healer does not last long if she is in the range of air defenses, so make sure you destroy or otherwise distract the air defense before sending in your healer(s).

One strategy is to send a few wall breakers in to break the wall that is protecting the air defense if it not placed centrally and is not well protected. Then send in a group of giants (usually 12 or more) to destroy it. 

 Finally send in a Healer along with other troops after the giants. 

As long as the Healer does not get distracted by other troops taking damage, or is not killed by a corner archer tower/wizard tower, the giants will live for a significant amount of time, (due to the constant healing) and will distract the defenses while the other troops destroy everything. This is known as a giant/healer raid and is extremely popular when attacking a town hall 6, since it has only one air defense.

Healers can allow giants and other defensive troops to withstand massive amounts of damage, even doubling that of their normal health.

Support the healer with durable troops like giants/P.E.K.K.A.'s.

Since you are able to heal a healer with a healing spell I have seen the trick of using it skillfully to actually heal the attacking troops the healer is healing and actually healing the healer at the same time...rare, but it has been used effectively.

Defensive Strategy :

 Healers will not last long if in range of a single-target defenses & air defenses, knowing this make sure you upgrade and protect your air defense as much as possible.

Centered placement of your air defense in the middle of the base will provide strong anti-healer ability and will not easily be as easily killed vs other placements.

Statistics :

Preferred Target	Attack Type	Housing Space	Training Time	Movement Speed	Attack Speed	Barracks Level Required	Range
None	Heal Splash 2 Tiles Radius (Ground Only)	14	15m	16	0.7s	8	5 tiles

Level	Heals per Second	Heals per Attack	Hit Points	Training Cost	Research Cost	Lab  Level Required	Research Time
1	35	25	500	5,000	N/A	N/A	N/A
2	42	29	600	6,000	750,000	5	3 days
3	55	39	840	8,000	1,500,000	6	5 days
4	71	50	1176	10,000	3,000,000	7	7 days