RPG Insanity

Hey there! Here replaying this game.

So I've got a few questions about soul maps:

1.  Best way to use them? I accept any advice.

2. Success ratio of power rebirth stones. So far, I've failed every attempt. Any way to increase success ratio?

Advanced thanks.

Honestly, you'll level up all of the soul maps normally but I would give a specific stat for each character to focus on. Look at the base stats of each character and if their strength is higher than their int, then focus on leveling up STR and SPD and vice versa. IIRC Grant and Selene are the STR characters while Laura and Bernard are the INT ones but you can make Grant a mage to take advantage of his light spells.

I think that was because you had to wait until you hit 100% on the rebirth stones.