Here's the options available (that I'm willing to commit to):

Option 1-

After failing enough times at a challenge, an Easy Mode could be toggled on for the next attempt(s). Easy Mode would lower the values of every non-target character, and in some cases even remove a mechanic the player would need to manage.

Option 2-

When utilizing Practice Night, an optional Tutorial could be selected from the Challengers list (appearing before Jack-O-Bonnie). It will have players fight a unique character that can't actually kill them, but will utilize every single mechanic OCN has. The player will need to successfully fend off all "attacks" in order to win.

Oh, and Nightmare Purpleguy would be replaced with a less threatening reminder about the E.C.V. in this mode.

Option 3-

After failing enough times at a challenge, an alternate unlock method could be selected. This would put the player back into regular battles, this time against an incredibly tough boss.

And spoiler alert if this option wins: I will absolutely make this boss a hard counter to the usual strats.

Option 4-

None of the above. The difficulty curve is already balanced pretty well for what it is and doesn't need any additional training wheels.

(That, and adding an easy out like these goes against the very core of how FNAF has operated for nearly a decade.)