Assuming only 1 5 star is on rate up it will always be 0.7%. Rate up rate doesn't change on number of servants
It is the remaining 0.3% that will get split up more and more as more servants.
In the Halloween gatcha you will have 0.7% for Tamamo. The remaining 0.3% for 5 star is divided among the 6 5 stars available. So in the Halloween gatcha you have a .05% to roll a specific non-rate up 5 star servant. That number will go down as more servants can be rolled.
The multiplier was just a way to show you how rolling on a rate up is always better for that servant than hoping they spook you at some point
Okay thanks, I realized the post I quoted said pretty much the same thing, I just misread it reading too fast.
She is niche. Her niche is basically to be a boss killer that does extra damage to divine enemies. I personally don't think she's too impressive outside of her NP though, and prefer Karna because he can consistently hit like a truck and contribute to Buster Memes.
Isn't Merlin needed for 'Buster Memes'?