So why did he go with water first? Surely electricity laws, since it's shown he was able to use quantam abilities already, would have been better than something he basically cannot use? Why not go for Zues' core first?
It doesn't matter, if it fails, he won't be able to use either core until the punishment ends. If one succeeds, he can do the other after a couple of days, or weeks at max when he is mentally prepared.