[Poruku]

I would say it makes more sense for youkai since they draw on the power of their summoner to stay in the world. Automatons are literally golems that can act on their own, and bots are bots. You could kinda argue it for the shine knights though.

That being said, one of the most annoying aspects of this is that summoners get to diehard and revive later, coming back into a fight that should have already been won. It can even be abused by making your summon kite around waiting for the rez. For this reason, any user of summons has a big advantage and it's difficult to balance around it.

I would be ready to say "all summons die when the main guy dies" would be healthy for the game and balance long-term. It would just make sense balance-wise and would feel much less frustrating when fighting one of them