Keep an eye on world chat, I see full GV's at least once a day. Or just start your own and world chat for party members. But...
If you're doing this just to get celestial demon so you can use certain demon skills, then... well, I'm sorry, but you've spent alot of time doing unnecessary quests.
After completing your 89 culti in eden for your 3rd spark, you can use the Third Demon Fairy, purchased from the boutique with vote gold. Right-clicking it gives you celestial demon immediately.
No further cultivation quests required unless you want to switch from demon to sage. Though, if you are just starting the game, I imagine it would be faster and easier to simply make a new character sage rather than go through the entire cultivation process to switch.