Well, considering that Mac has the strength to knock down a tree-full of apples with a single kick, the stamina to run at top speed for hours on end, and the incredible resistance to injury shared by all Ponies, I would have to say that this one is fairly obvious.
I have read the link but i don't have no idea who Saber Rider is but from what I got I think he would win since range vs melee realistically means range wins... Earth ponies aren't very magical though... Alicorn Twilight vs Cthulhu, that would be interesting!
I watched it, it's alright but a bit cliche... Yeah I still think Saber Rider would beat the hell out of Mac!
