Basically, I am looking for party-based RPGs (has to be party based for reasons that will be clear) that have a specific playstyle. Namely, I am looking for games in which:
* Death can be easily recovered from, ideally as easily as (or easier then!) status like poison once you're strong enough. Furthermore, doing so should not require tedious busywork (looking at you, Baldur's Gate 2 (where characters drop their entire inventory on death)).
* It is possible, and a good idea, to build your party setup around letting party members die and then reviving them; in particular, there should be ways to spec your characters to benefit from character death.

Some exampeles that I have seen:
* Phantasy Star 3 has a spell that revives a character at full HP, and another that kills the caster and fully heals the rest of the party. What's interesting is that you get both those spells almost right away (albeit only on the same character at first, but you don't have to be alive to revive yourself out of battle in this game), and that there are items that cast both these spells for free.
* Lennus 2 has a similar situation; there's a spell (costing only HP) that, if you're skilled enough, will fully revive a dead character (while fully healing a living character requires medicine, which is harder to restore (but can still be restored easily and cheaply in town)) and another spell that kills (or severely injures) the caster to heal the rest of the party.
* Etrian Odyssey 3 has some skills that trigger on death, including a Monk skill that restores the user's TP, and I think Ninja might get an attack. Also worth noting that Ninja get a summon ability that summons a weak character who the enemies are likely to attack and kill, allowing you to trigger these effects cheaply.

So, any other party-based RPGs that support this particular playstyle?

Dragon Age Origins: you don't die unless you really screw up in the battles. I didn't play it but as far as I know, characters lose their "stamina" and drop down "dead" until the end of the battle. Maybe you need to cure them afterwards but you don't have to pick up their stuff and go find a priest and THEN re-equip the characters,

Pillars of Eternity (at least the first, don't know the second one) has a similar system. Stamina gets you knocked-out and after the battle the character is still alive. There are certain types of damage that do reduce the HP instead of the stamina, but those are not really common as far as I know. I only played a little bit with a friend's copy of the game. HP is only recovered by resting (which you used camp supplies for) and stamina is recovered by resting and potions and such.

I believe Original Sin and/or 2 also have a "resurrect characters in an easy way" kind of gameplay, but I haven't played those ones.

And as far as I know, stay away from Pathfinder: Kingmaker (is supposed to be super hard).

On Divinity Original sin you can get creative with that kind of thing. For example, you can kill your own party member then resurrect him with full hp if you have the correct talent in your build. There are a lot of fun and creative options available to win the battle using fun, smart and even unorthodox ways.

Resurrection scrolls may be expensive, but they are easily obtainable through normal gameplay without any problem, even on tactician which is actually really hard.

Divinity: Original Sin 2 is the game for you.

It's probably the best, sort of "sandboxy" RPG game.

Just to be clear, I'm not looking simply for games where death isn't particularly costly; I'm looking for games where intentionally lettng characters die and then taking advantage of the deah somehow is a viable strategy. The example of killing a party member and full reviving the character is one, but to me that doesn't go far enough; I want something more interesting than that!