Depending on the situation, i'm using:
[Idol of the Emerald Queen] - mainly for long matches where almost all healing comes from stacking lifeblooms that i keep rolling
[Vengeful Gladiator's Idol of Tenacity] - for purge/dispell heavy teams
[Idol of the Unseen Moon] - 2on2 as restokin
If you let it bloom most of the time
[Vengeful Gladiator's Idol of Tenacity] ads more heal than
[Idol of the Emerald Queen], ofc.
If you max rank Moonfire DoT and/or rank1 MF a lot
[Idol of the Unseen Moon] is really nice, since it adds very often 140 heal/damage - it can proc in a row, seems there is no hidden CD and it basically procs almost every time when you "renew" MF on a target after the DoT is about to expire.
I have all 3 in my backpack and switch them when switching is necessary. However
[Idol of the Unseen Moon] becomes more and more my main used Idol for 2on2 in most cases. It really shines, once you get used to it. Note: I'm playing 34 balance/27 restoration.