i am curious of that too

The text says your character not your target or ally, but I think it would be interesting if it did

Yeah, but then it mentions what it does if you target a summon, which would require it being able to target an ally.

can confirm it can be cast on allies and even enemies. accidentally cast it on kemm just now instead of on myself.

Bloated Corpse + Supercharge + Death Wish + Living on the edge? Need to try. I'm even wondering if it works.

I tested this and sadly it doesn't work - the summon still disappears once Supercharged runs out. Same result with the "Door to Eternity" summoner skill. Supercharge just ignores all of those death-resist effects.

Is it total bull*****or does lava not just kill you, but also drown you in lava and destroy your body so that it shouldn't protect?

Thats a lie, it protected me well against lava in that battle

Shackles of pain doesn't go through physical armor anyways, so piercing damage is redundant.

You are overlooking one thing:

Lone Wolf runs where you attempt to win the game with 1 character.
There are a lot of enemies that will almost certainly kill you in battle, or who will kill you for killing them (such as Alice Alisceon due to the Level of her Retribution, or the zombies around Radeka in the island of Fort Joy when you attempt to rescue Slane).

You're also overlooking turn order, character positions and, most importantly tactical control. Taking control of a risky turn by casting LoE is superior to hoping to be able to resurrect after **** hits the fan.