So I just got Shingen unlocked and want to get her a soul weapon. From what I read, the bow looks like a no brainer. But, I'm still not clear about how it works.

1) Is 500% really 500%? In other words, if I can get each hime to burst for 400k w/ Herc, are they really gonna do 2m each w/ Shingen? That would be broken. What's a more realistic figure?

2) That 500% costs Shingen half of her guage. How does that work in practice? Do you do a 4 burst right away, or do you apply the boost, then get Shingen up to burst and do a full burst? Is there a time limit on the buff, or will it stay until whenever you burst?

Thanks.