Time Quest 9600!?

I'm having a rough time, but getting 10,000 from the hidden quest at level 260, then it drops to about half that and doesn't go back up to 10,000, just slightly increasing from there and ending... If I could get around 50,000 gems at level 1000, I might think about trying harder... but the time investment versus gem reward ratio is completely off for levels above 260, so I think quitting at 260 is the smarter choice... If the hidden quest rewards fluctuate, at least give us a big fireworks display (reward) at the end... I have no idea what you're trying to do.