I put up over 848 mil on factory settings with the 1.0 ROM. Took 2 completions of BFTK. I choked on the 3rd BFTK as I timed out before bringing the Trolls up for the 3rd try at BFTK. To this day I can't believe it was the peasant ramp I couldn't hit to start bashing the castle gate.
The best thing is that I started Royal Madness right before starting BFTK for the 3rd time. That was one of the coolest surprises ever.
I haven't been close to that in 4 years but my goal is a Billion without any special or replay extra balls. Play better.