User blog comment:Cfp3157/Percy Jackson vs. Harry Potter/@comment-24180428-20131103003408/@comment-4661256-20131103222230

"Riptide all the way. The wand is wood." You happened to leave out the part about Riptide being made of celestial bronze - the only material that blade will tear through it demigod flesh. Percy's weapon is going to be absolutely useless. "Even without Riptide, Percy can still rely on his other abilities." Even with his wand, Harry is still capable of performing magic. Point in case: http://harrypotter.wikia.com/wiki/Wandless_magic

"Harry has a greater variety [of abilities], however take away the wand and all those nice abilities are gone." See above link. "All Percy needs to do is stay near the lake in Hogwarts... and Harry is done for." Yeah, no. The lake is on Hogwarts grounds, which is a magical environment, and it has magical properties (considering there's a whole host of magical beings living within its confines, including merpeople and a Kraken or giant octopus/squid thing or whatever), so it might not be as responsive as would be helpful to Percy.

"Clearly Blackjack is superior. Blackjack is faster..." Blackjack is susceptible to physical pain and psychological attacks, and he may become unresponsive if frightened. Harry's Firebolt is faster than Blackjack - not the other way around - considering it's magically enhanced for high-speed aerial sports. On top of that, Harry can just blast spells at Blackjack and injure him or turn him against Percy and leave the demigod grounded and facing the frightening prospect of having to fight off his own brainwashed ally.