You're telling ME to read about the Rage Spell? The guy who wants every idea of his to be perfect and thus takes a couple of weeks comparing it to that stat of other spells? *Sigh*
No, it's not OP. If you WERE to combine the Rage Spell with this, there would be a bunch of different scenarios which keeps this spell high risk and high reward. First of all, the Rage Spell lasts much longer than the Inferno so even at maximum level you would only receive 8 seconds of rage with the Inferno Spell. Second, using a combination of these in one spot would cost you 4 spell slots, when you could be spreading them out to support everything.
Third, this spell is not powerful enough to completely obliterate a village on its own. It takes a lot of strategy. And finally, the fact that it doesn't work on walls or defending units. A lot of players have heroes, walls, CC troops, and skeleton traps near their town hall! Which means troops could waste time by breaking a wall or be distracted by Skeleton Traps or heroes! Remember, The Inferno Spell will not work on those which means while your troops are doing those things I just listed above, they would be wasting the duration of the Inferno Spell, which isn't long at all.
I hope you get it now
Here's what's new!
*Duration decreased across all levels