If I die, can I choose revive in the battle or shall I choose no?. I ask this since I discover a little exploit for the turns (since we're always on a low-level run, if you are extremely low level, multi-target skills will oneshot you, when you choose revive, the game let you have again all four turns even if it was the very first turn of any demon of the boss or the main bosses started he's/her's turn.By doing this, you will always have more turns than the boss)

As shown here:

is it only 1.5 allowed? it seems pretty hard to get on the internet but 1.6.0 is not a problem though.