Is Castiel more powerful than Crowley?
While Crowley might be at the very top if you take into account the power of the mind, we're strictly considering inherent powers here. In that regard, he falls well short of Castiel, whom he had always avoided picking a fight with and would generally joke around to stall for time.
According to the Supernatural Wiki he becomes as powerful as Chuck. He was able to smite Raphael and did a slew of other omnipotent acts such as breaking deaths bindings.
1 ANGEL: MICHAEL
Michael is the last remaining Archangel and because he was the first, he is also one of the most powerful beings in the Supernatural universe. Castiel even says Michael is stronger than Lucifer, who is the most feared angel.
Powers and Abilities. Castiel was one of the top angel soldiers in the Host of Heaven. After Lucifer killed him, God brought him back as a Seraphim, the second highest rank angel class in the angelic choir.
Originally, Crowley is described as "Lilith's right-hand man and King of the Crossroads", with the latter title referencing his role as the leader and "the most powerful" of the crossroad demons, a special subgroup of demons in Supernatural who fulfill the traditional concept of a "deal with the Devil" for one's soul.
Add in the fact that Castiel is not a regular angel, he is another Seraphim, and he far exceeds most angels' power.
Archangels are shown to be considerably more powerful than the Princes of Hell. While at full power, Lucifer was greatly feared by Asmodeus and Dagon and the weakest archangel, Gabriel, was more than a match for Asmodeus in combat and easily killed him.
Well, his grace was stolen from him. That's what made him human. When he did eventually get his own grace back, his wings were damaged. He didn't have the same strength he once did because of this.
The lack of grace pooled up in the bank may also explain why Castiel's powers are so weak – he's gotten a little bit back in more recent episodes but during the early part of season, his power failing was both made visibly evident when healing people and lampshaded as a plot point when he spoke about it in his big ...
Zachariah was a high ranking angel and the direct superior of Castiel and a direct subordinate of the archangels, but after the fall of Lucifer and Gabriel fleeing, he served Michael and Raphael. He had been alive for over 6 millennia. He came to Earth following Uriel's death and after his betrayal was revealed.
How powerful is Crowley Supernatural?
Super Strength: Crowley possesses supernatural strength to overwhelm humans. He can overwhelm lesser demons except Greater Demons, all monsters except Alphas, Ancient Ones, Adam, Eve, and Leviathans. Any angel can overwhelm him. Cassandra easily held him by the throat as she had Dean bleed him for his blood.
Supernatural Perception - Like all demons, Crowley could perceive Ghosts, Reapers, other Demons, and even Angels while humans couldn't. Super Strength - Being the King of the Crossroads and then later the King of Hell, Crowley was endowed with incredible superhuman strength.