User blog comment:Cfp3157/Percy Jackson vs. Harry Potter/@comment-222.127.174.119-20131029144910/@comment-4484220-20131029174635

The only time that Harry ever used SectumSempra was when he had no idea what the spell would do before he cast it. The only reason he used it in his duel with Malfoy was because the book of the Half-Blood Prince said that it's a good spell to use on enemies. Despite not liking Malfoy, Harry felt bad about what he had done, and did not use the spell thereafter. This battle takes place after the events of Deathly Hallows, so I'm afraid to say that your argument for Harry using SectumSempra in this battle is invalid.

Harry is not one to use lethal force, even against his own enemies. The only human being who ever died because of Harry's intentional actions was Voldemort, and it wasn't even Harry's own curse that did it. Now not everything Harry uses in the books and movies is listed here, but there are a lot of spells in the Harry Potter world. Listing all of the ones Harry might use would be cumbersome, so Cfp whittled the list down to the ones he felt most prominent. And remember that the list serves to inform those who aren't too familiar with Harry Potter, not to limit his powers. Any spell Harry knows how to do and is likely to use can be used as a valid argument on this blog post.

I wouldn't be entirely against Harry having his invisibility cloak, but really the sword of Godric Gryffindor is not something Harry uses or has at his disposal very often, nor would it help him much. The only things he used it for were to fight the Basilisk and destroying horcruxes. I'm also curious as to where you got the idea that Harry is a talented swordsman. He has just about no sword skill. When he killed the Basilisk, it was a simply lucky swing that landed itself through the snake's brain. It also caused Harry to get punctured by one of its fangs, which would have killed him had Fawkes not been there. The only thing stopping Harry from getting annihilated at close quarters is the fact that Percy's sword cannot harm mortals.

I'm afraid that the only argument of yours that I see as bullet-proof is the fact that Harry can apparate in this fight given that it's after the events of Deathly Hallows.