Well I won't use Shingen's HP relic weapon.
Hercules would be the better choice to reach def cap with less debuffers and I could run more damage dealer or rather switch Dark Amaterasu with another SSR dark Hime.
Therefore Pluto isn't a bad option. PF+3 lego stack = 500% will be enough.
Yes, it's google's fault
Well, even if you have just one lego stack + PF you will reach 300%, that's also not bad.
And yes, you are right we should wait and see if Pluto is good enough to use a miracle ticket for her or not.