I'm happy to help! ^_^ Now, let's see...

@Phobos: I'm sorry, but your entire bio simply doesn't work for multiple reasons. To start with, the entire terms of a contract in this setting are "enter the human world in exchange for working with, fighting for, helping, and granting you power". The terms of their contract would not involve stealing souls, absorbing beings, or weakening the contractor. On that note, this is a school setting in a world where contractors are an accepted, daily thing. A contract like that would probably be forced back into the magical world, since it's clearly malevolent, uncontrollable, and dangerous. Especially if it was being brought into a place where it could harm students. Humans in this setting also have no magical power until they enter a contract with a magical being, so magical ability would be a complete non-issue. Finally, while OC supernatural beings are allowed, OC gods are not, as the entire point is contracting something that exists in mythology.

@Hesoca: He seems fine, but I just have one question: He's not going to be lifting people up inescapably with the telekinesis, right?

@Shadowcatcher: While the bio for your contractor looks fine, there are some issues with your contract. The powers listed seem okay, but he can't have unlimited power that she simply doesn't use when they're fused. In addition, the powers he has as a summon must be listed.

@edboy: Unfortunately, there are a lot of issues with your bio.To start with, while these are not the most serious issues listed, the contractor being 2000 years old and participating in every human conflict is a bit... strange, to say the least, and a weird fit for this RP. But the real problems come after that.
This is not a setting where any deity, regardless of who they are, participated in the creation or rules or whatever of the world. All deities exist in the supernatural world, and these days unless someone has a contract with them they cannot enter the human world. Even in the past it would be the same, though the contract system was likely not fully understood and there was more ambient magic in the world allowing deities and things on there level to cross into the human world on their own. Archangels fall under the same system, and the terms of a contract in this setting mean they would indeed be able to physically manifest in the human world because that is quite literally what a contract allows for the contracted being.
Then, well... beyond possibly being able to contract a specific being easier, names really don't have much in the way of power in this setting. It's just not one of the settings where things world like that.
Teleportation to anywhere he's been, given his long, long lifespan and involvement in so many conflicts means he would probably be able to teleport just about anywhere on earth.
As per the rules of the setting, no contracted being would require to possess anyone to have a physical form in the human world. The contract takes care of that.
The holy energy is fine as long as it's not going to be instantly destroying characters on a touch too.
Limitless teleportation is absolutely not allowed. It effectively allows unlimited dodging in a fight.
Telepathy is not allowed, as it is very easy to ruin a plot by being able to sense the thoughts of others.
Resurrection is something I honestly think should be limited to more powerful gods. Or maybe personal resurrection with something like a Phoenix.
Supernatural Perception isn't so bad on its own, but you state that Reapers and Horsemen of the Apocalypse would be invisible, which... isn't the case for this. I'll be honest and say Supernatural probably isn't the best base for anything for this RP. ^^;
Weather manipulation seems kind of... random at best, honestly.
Pyrokinesis seems a bit excessive on top of holy energy but it's not as bad if the limits are clarified.
Thermokinesis is definitely excessive and much more easily abused.
These last few powers might not be so bad on their own, but together it kind of forms this massive list of simply... too many powers for one contract, many of them without much in the way of a real connection to one another.
In its current state, this bio's not acceptable.