Re: Nightmare Sphere is out...
I've played through the game on my own with no guidance whatsoever, and I managed to get through it, so I can assure you, it's not impossible. Top right is the wind elemental area if I recall correctly. I recall doing that one either third or fourth in the elemental order. The most useful skills are the sword and hammer up abilities which give you an additional jump technique. That combined with all the other jump upgrades you can find combine to let you do pretty damn well everything you need to do. Jump your way through the wind and up to the top. It is most definitely possible.
If it's still beyond your reach, go do the earth and fire elemental zones first if you haven't already. Those extra jumping skills are key.