I'm sorry if this has already been asked before, but I was wondering about how hero levels effect the scaling difficulty of the Tower.
Early in my DB career I developed a notion that leveling up my heros made the floors harder.
as I progressed through the game, I had extra heros at level 1 that I never bothered to upgrade, and I associated this aspect with the Tower seemingly easier to defeat.
so my question is this: is the difficulty of the Tower scaled to the average cumulative strength of your heros (hero level + stats), or is actually based on your developed level?
basically i've left a bunch of heros behind at level 1, with the notion that this makes the tower a little easier, but I've never proven this.
I would like to upgrade levels and stats on some of the low level heros I've collected, but I'll pass if it make the tower harder.