They're not too hard, of course I had a lot of practice with games like Street Fighter back in the day with the diagonals. If you're having problems, use this little trick: Of the cardinal directions, tap the first direction twice, then move on to the next cardinal direction. Thus Aura Bolt will be down-down-left, Fire Dance will be left-left-down-down-right. Substitute two cardinal direction button taps in for one cardinal and one diagonal button "drag" and you should be able to execute the blitzes without any problems!