User blog comment:HazelQuill7445/Awesome fan art/@comment-25936766-20170805230722/@comment-25936766-20170806001525

I'm not saying they should be exceptionally skilled for those classes though. The Servant Classes have surprisingly-broad requisites. For example:

-Tesla can be summoned as an Archer because he's good at fighting from range, by manipulating lightning. Even though, skill and achievement-wise, he's more suited to be a Caster.

-Cu Chulainn can be summoned as a Caster because he also learned Runecraft from Scathatch, even if he's infinitely more well-known for his Gae Bolg and his Warp Spasm, and miles better at physical combat than at using magic.

And of course, there's Servants like EMIYA  and Gilgamesh, who don't exactly fight like one would expect their class to fight.

.......But regardless, I seriously just cannot see Weiss as a Saber. Even less as Saber Artoria.