Arthur was the first in my mind as well when I made the prompt - future!Camelot being the second- so I can only agree with you that Uther and Merlin would reach a common ground about doing anything if the end goal was Arthur's life. My own fanwank is that Uther prefers to stay oblivious to recognizing magic for what it is, until it's so blatant and/or public that he cannot go on (based on all those episodes where he doesn't listen to Gaius' private advice until it cannot be ignored). Unless a Knight being present actively comes to him and says that they are all certain that Merlin's doing magic, Uther would probably doubt it. I like how you've given a glimpse of this in Uther here.

Do you mean The Old Ways or another one? Because if it's the former, then I've read it, squeed, and it's been opened and reread and in need of being commented on for days now. If you mean another one, if it's no bother to you, I'd really really really like if you'd post it somewhere. I think there is some very nice potential in this pairing to explore some sides of Uther and Merlin that fanworks often leave aside, so would love it if more works were being spread. ^^