[Skullcatrons]

1: super tanky character that heals itself and destroys everyone in 1v1
This is a type of build I've played before. Absolute cancer. How are you gonna interference me at 190 sr. You deal 84 damage I heal for 200.

2: aoe healing
Insane value in events and team pvp to the point where if there's a healer in a group I know for a fact they can handle more difficult mobs. And if I fight a team with a healer I know I'm screwed. Give an elf spellthief priest to ANY pvp team and it's suddenly a god tier team cause they will never die.

Interference is useful but not gonna fix all the problems. Not even mentioning the fact not everyone has access to it. You want a "either heal or get interference" meta??

Number one's issue comes from DR Doomstacking meta which escalates to something else, and isn't entirely exclusive to healers. Most of your problems when facing against DR Doomstackers was to Fray, Acid-Rain, Burn, Ravage, etc. Any form of methods to shred armor and DR%. 

This unfortunately is a problem that wouldn't really be solved if you nerf healing. In this case, heals are like extra needle in this needle-infested haystacks of balancing issues when it come to DR-Doomstackings. It wouldn't solve the problem. But then again...

the second problem is even more clearer. Spellthieves and Elves. If you were to just put a handcap on spellthieves' healing capability, they would flicker out like ashes to the wind. It's not like Dev hadn't nerfed Priest's Malmelo because priests were overpowered. (Spoiler: Malmelo's HP% was originally based on ranks and not on FAI% capped by rank. This change was done because of Spellthieves stealing Malmelo spell.) There's also additional problem that need to be confronted, and it's elves. One, if not most notorious race to be found among hardcore healer-players. Especially moreso now that Jade Whistle exists. Meaning that elven players could run Performer/Spellthief build. Why Performer? Because Performer's song-passive would empower Cantus of Consideration to cure debuffs. Not only did this serve to further empower Elves because it scales off SAN, but also lead to whole can of worms in a lethal sense. 

What you're looking for is not a heal nerf, but racial nerf toward elves. Something I'm all about for so damn long.

Interference is useful but not gonna fix all the problems. Not even mentioning the fact not everyone has access to it. You want a "either heal or get interference" meta??

You may be joking, you may be jesting. Hell, you might be jousting.

But that's exactly the way about it. We've three status debuffs that you could employ. They are silence, interference, and confuse. Dev have been slowly adding more confusion-inflicting conditions. And with confusion, healers cannot heal their companions. They can heal themselves, but they can't heal their buddy. Interference prevents any kind of healings. And silence forces a healer to spend a 3M, be a race with increased FP cost, get a consumable Throatopener, use a screamer tome, or just cry about it.

It's not like it's any worse than

Hit vs Evade meta.