[@VanceXentan]

Fortunately I took Rider's being summoned into account. A Servant without a Master is gonna be looking for a suitable partner, and Clocktower professors are usually pretty high-class magi. So it would just be a function of the two encountering each other and forming a contract of necessity.

But yeah, I'll acknowledge that I'm hardly the fastest writer of us lot. That said, due to the nature of the partnered backstory thing, Team Rider wouldn't exist in a vacuum like Team Berserker, since Rider would also be able to interact with Turbo's Master and Archer pretty frequently. 

[s]That said, if the issue is that Leon supporting too many Servants is too unrealistic, you could just give her to Satsuko. Especially since you said Satsuko has magical potential, and Leon can support Lance on his own.[/s]

Ultimately I'd say it's all [@BubbleGumKing]'s call, though.