Yeah, the first one, Special Moves After the Super Freeze, I saw a guy using Mamiya's motocycle super to hit cpu's Toki, then got hit by a move and game froze.
"crouching weak kick -> Banishing Strike -> auto boost -> standing hard kick -> It Hurts! -> grab times n."
Mr.Heart is the beast now:P
About the high score, I think it's possible to get above 16,000,000. Because I beat Kenoh with two perfect and second round 5 sec FKO with Shin I got above 2,000,000 for that match!!! But you need a lot of luck to get all perfect for 8 matches in a row.
Anyway, I will try these tricks today.
BD grab is evil!!! nah, it's not that efficient because you need a lot of boost bar to perform -4 star combo. And shin't BD grab is cool and useless.
On the other hand, as I suspected, Jagi's -3 star combo: 2B > 5D > C+D > 6 > 5D > 632146D > A+C+E > 2369A needs no boost gauge thanks to the auto boost system. Basically after auto boost, you can boost at least once more for free during a combo. Abuse it!