Playing a Balefire amazon after I found a
Defense: (1708 - 2049) to (1728 - 2073)
Required Level: 100
Required Strength: 456
Item Level: 105
+3 seconds to Balefire Buff Duration
Self-Immolation damage per cast unchanged
+(2 to 3) to Amazon Skill Levels
25% Cast Speed
1% Base Block Chance
+15% to Fire Spell Damage
+25% to Physical/Magic Spell Damage
+(100 to 140)% Enhanced Defense
Fire Resist -20%
with a different build.
I've played both versions. 1 without Karcheus, a couple of weeks ago, and 1 with it now. IotsS alone already turned from absolute cancer to an actually viable farming area just because of this single item. And I'm not even talking about the build becoming absolutely OP. Because it still isn't (looking at you, teleport bosses). It just becomes viable because of Karcheus.
Imho you should consider making this skill independent from Karcheus. By that I mean you should consider turning Karcheus' special effect into a standard part of Balefire.
I'm still testing, so I may or may not update this post. But for now this change seems to be appropriate.