Found this in New Legends of Project Soul which confirms my stance that Soul Edge users (and everyone who scales to them) should receive scaling from the top tiers, which means just about the entire cast eventually. Which should mean that the entire cast should be about planet level.
Straight up saying that Soul Edge wielders = Inferno in power. Top tiers are still top tiers and they're generally staying the same, but the rest of the verse is no doubt receiving a massive boost from this.
Still, the fact remained that Soul Edge was only able to unleach its true potential when it changed into a form that suited its wielder. As such, if Soul Edge hoped to devour souls efficiently, it would have to find a worthy host and change its form accordingly.
Straight up saying that Soul Edge wielders = Inferno in power. Top tiers are still top tiers and they're generally staying the same, but the rest of the verse is no doubt receiving a massive boost from this.