To be clear, Herriman is a lot more than just a tad bit overpowered compared to the rest of the characters. His animal skin alone means he only takes the damage you want him to take, since there are no limits or restrictions on what it can and can't block and how much. It's a Deus Ex Machina that can save him from anything you can't think up another counter for. 

And then there's the magic. Which has no limit on how much he can use or what he can do with it. Based on what you describe in his bio, he could destroy a planet and still be within his "limits". 

Next we have the shapeshifting. Which also has no defined limits. If he so wished, Herriman could make himself two hundred feet tall and just stomp anyone in the arena to death. Or get rid of his vital organs and weak spots by altering his interior biology to be more like that of the planarian worm.

Each of these alone would allow him to outclass every character he's fought thus far, but they're not why I brought this up. I brought it up because Dag PGed when he gave Herriman the speed boost. It doesn't matter what you think of in an arena setting if that thing isn't allowed for by your CS. If I had a character with super strength fighting a water monster, and thought of turning it to steam with fire breath, it does me no good whatsoever unless my character was accepted with that ability. 

Put simply: You can't just make shit up on the spot because you're afraid your opponent might beat you. 

If you want to use blessings, that should be a trait given to all the characters and their gods and specific blessings added to each CS, not made up on the spot to remove your only physical weakness, especially when you already outclass your opponent in every single other area.

And since you bring up receiving blessings to better match your opponent, does that mean Mifune should receive massive blessings in strength, durability, and magical powers? Because that's what it would take to even come close to "better matching" Herriman.