My Griffin is one hell of a stubborn combatant and the way he goes about combat is automatically gonna be drawn out for a bit. First he deducts whether you're even worth his time, then he tries to gauge your strength and matches you accordingly. Not to mention all the ridiculous abilities he has in his back pocket. Suffice to say, any opponent might as well get comfy with my big majestic bird kitty.
On the topic of his power level, I'd surmise he's a high mid tier. Even though he's unbelievably resourceful and perhaps a bit overpowered at first glance, he has no world destroying abilities even at the peak of his power. The Rampant Form's endless Wrath boost could potentially reach island levels of destruction, but that's about it.
Also, I'm more than welcome to the idea of juggling more than one fight if anyone wants to challenge the Knight of Hubris heheh.