[Fern]

It also makes you take about 210+ damage if you specifically build for it. In most cases, it leaves you highly vulnerable after trying it, unless it's a one-on-one. I'm speaking from personal experience with it.

The screenshot's example dons 1100+ HP, as well as an off-handed Screaming Tome.

It can get absurd, yes. If I remember correctly, Screamer is not even supposed to buff Matador's Rage Energy, and the problem with Narcus is just that all the damage you take is returned to the enemy as damage.

So I want to say that the problem is mainly Narcus, and that lowering the amount of LV it gets when you take damage (by 50%) or capping it will kill two birds with one stone, in a way.