Shaman/Skyseer Healing build for grind parties

Hi, while leveling my classes i noticed that having a high lvl shaman in the party, who is only there to heal is extremaly helpful.
I'd like to one day level up a shaman class and be that helpful healer :)
I've searched around but couldn't find a build that is only for healing and I really mean ONLY FOR HEALING.
I think that the more damage you do in a grind party, the faster you level up so while playing shaman in a grind party i would like to not do any dmg so i don't steal the exp from other party members.
I don't know if that is possible but if you now any builds that could provide a lot of healing and close to no dmg than please share them here with a skill tree and everything that is needed :P

 

https://hppeng-wynn.github.io/build...Sw0QI-q0e0z1p0Z1g000000z0z0+0+0+0+0-j-sZsFSN0
WynnBuilder build:
> Cancer֎
> Hetusol
> Pyrrhic Respite
> Statue
> Symbiont
> Symbiont
> Atavistic
> Amulet of Rejuvenation
> Absolution []

if mana is too low then use Eden-Blessed Guards as leggings instead