point of order: it's giving unconfirmed characters magic circuits, not making them magi
It's still stupid, at least if you do it to
everyone. Plus, it requires Rider to actively seek out such a person, which there is no reason for her to do.
Doing it with one servant/master (Ayako and Caster) is within the realms of suspension of disbelief, but doing it with
two is just stupid. There are not that many magi around, and even if there are Rider has to
find one of them.
I do not want to sideline either character but something has to give here
Yes, but I do
not like the idea you're suggesting, one bit. Not least because her protectiveness of Sakura is the thing I like the most about Rider.
Plus, like I said, with the way you're aiming to go we will end up side-lining them
both.
rider likes sakura but she's hardly obsessed with her, she has things and thoughts beyond sakura.
Erm, I think you're seriously underestimating how much she cares for Sakura. Sure, she does have a life aside from just "protect Sakura", but it's clear that she is
extremely devoted to Sakura, and would do anything to protect her.