Talk:New Beginnings/@comment-31169567-20190112051129/@comment-25563155-20190113132936

Some addition to what Kushieda minori already said: if you have 3 map pieces, you can start the last wave of the final boss battle and when you're in a position to land the final blow, wait for as long as you want for your BP to refill - you'll get the rewards even if you end up spending over 30 minutes in the battle. With this method you can start map with full BP. There are, however, 2 issues with this:

1. reliability

The obvious one: if there's a patch issued while you wait, your game crashes, your phone restarts, etc, then you'll lose the battle and get no rewards whatsoever.

2. effectiveness

Even if everything works out, it's simply not worth waiting for your last BP. As others have already said, unlike in tower, you can't predict that you'll get the last map piece, and even worse, you may end up getting a BP refill instead. Let's do the math (based on advanced difficulty because, well, that's what I have experience with :P): the worst possible round (3 angel maps + boss) gives you 2064 points and 172 cores. Full treasure rounds give you 2496 points and 208 cores. Assuming that there's no additional bonus from hidden areas (I only got 1 map piece since I started writing down the numbers, so I can't check this atm >.<), this means that even the worst regular round gives 4.8 times as many points and 5.2 times as many cores as the hidden area bonus would add on top of that.

Long story short: even assuming that you only get the worst possible scoring rounds, you lose as much by a single wasted BP refill as you would gain by 5 rounds spent in the hidden area. Unless the map drop rates are significantly higher than the BP refills (which most certainly doesn't seem to be the case), waiting for 5 BP hidden areas is actually worse than sticking to 4 BP runs.