After traveling to Heaven, John avoids a physical punch from Spectre with a teleportation spell:
http://imgur.com/X2PTphI
http://imgur.com/WSeQwJ9
http://imgur.com/IbvwXGT
http://imgur.com/o826j6R
After mocking The Voice(of God), it was stated by Spectre that Constantine was able to 'fight' The Voice's wisdom:
http://imgur.com/WJgyeBV
John states that he could trap Spectre with a 'Vortex of Kellemore' incantation if he wanted to:
http://imgur.com/qzATchC
This gives credence to his previous claim that the earth's most powerful mages were capable of 'neutralizing' Spectre(to which Spectre agreed):
http://imgur.com/2EyqCHn
http://imgur.com/TJRKb0u
John states he can 'handle' Phantom Stranger(which he's already done a few times):
http://imgur.com/LavxQEW
Teleports out of Heaven, and is able to outrun Zauriel long enough to reach the House of Mystery and invoke a 'Celestial Circle' imprisonment spell that is strong enough to trap Zauriel in the material world:
http://imgur.com/0wo8zRu
http://imgur.com/6bGJjy3
http://imgur.com/1wZJdho
http://imgur.com/EZ6u7ki
Remember, Zauriel was powerful enough to erase Phantom Stranger entirely from existence-- in fact, it took The Voice itself to resurrect PS from this doom:
http://imgur.com/kjWXkEO
http://imgur.com/i45GKqU
http://imgur.com/cVN3tEB
http://imgur.com/cIHZFuk
http://imgur.com/K8npwNC