Although I'm staying far away from the rest of this discussion, I'd just like to point out that this is unlikely to be nearly as good as it sounds.
Now, "100% more" means "double damage." However, +100% burst damage means that you get 100% (one auto-attack) damage added to your Burst. SSRs already have 500%, so for actually double damage, you need five stacks. This might not be too problematic, but keep in mind that currently our +burst is capped at +300% and later at +500%. Also note that Hime like that are usually incompatible with Provisional Forest builds as Shingen puts you to +burst cap anyway. Furthermore, burst damage cap is a thing, and Hime with +burst damage will just hit this damage cap. Maybe. I'm not sure if that's going to happen without double P2W Eidolon...
Anyway, I haven't looked up if Pluto works like this or not, but you may want to tone your expectations down a bit.Because these are just added to already existing modifiers, you're NOT going to get +50% damage. More like 5-10% from the Atk up and ~15% from the elem+. Less if you have a P2W Eidolon running.