2) Yes, if you choose the "right" answer you get the opportunity to buy the charm of this area. you only get the this choice if you don't have the charm of that area yet.
If you don't have an amulet, it's trickier. I guess you can try to maintain your multiplier, but that's not easy to do. Honestly, for your first game, through, I'd recommend balancing all stats and picking up the three decay rate amulets. This minimizes point loss until you can focus on two stats, which you should do from every game after that. If you're balancing all three, just appeal in order. I wouldn't bother bursting for a while.2) As stated, it's for amulets. I wouldn't bother with these until the second half, when your schedule tends to be a lot more open since you don't have lessons to worry about. You'll probably be running a lot of performances for money at that point anyway, so just look out for the ones that have the amulets you need. (You'll want the three decay rate amulets and at least one of the two voltage increasing amulets, if not both.)
And also, what did you mean when you said 2/2/6 burst pattern?
However, don't many people recommend raising two stats instead all three of them? Is there enough time in the game to raise all three stats? Or do the stats carry over in the next playthrough?For the amulets, you can only equip one amulet, right? So, in what concerts would a Decay amulet and a Voltage increasing amulet be useful?
I think you meant pick the "left" answer if you want the opportunity to buy the amulets. However, don't many people recommend raising two stats instead all three of them? Is there enough time in the game to raise all three stats? Or do the stats carry over in the next playthrough?