So, hear me out: If you have both of these on the table, each time you deal combat damage to a player, that damage gets copied to other opponents as well by Kediss. But Breeches doesn’t require combat damage, any damage is enough. Also, Kediss states that the original source is also the source of the new damage. So, you can get three cards exiled in a three player game. Not that you can count that as three card advantage, since there is no way you can play all of them, but it will give you plenty of options.
Why have anything to cast in your library, if you have other players’ libraries to work with.
Even if you are not planning on playing a monored deck, there’s a strong reason to build such a deck, because you are going to be playing against one. Interestingly enough, I didn’t see any Atarka Reds at GP Paris, but when rotation happens, we are going to be in a situation, where decks are going to need tuning in order to fight the red decks, so red is strong in the beginning.
Admittedly, Temur Battle Rage sort of speaks to me, but I don’t think its that good. Especially not for pushing damage through. For that, Titan’s Strength is going to be better most of the time. Its cheaper and does three fairly reliably. It also works well with Prophetic Flamespeaker. So, Battle Rage might work as some sort of poor fifth Titan’s Strength, but not much more than that.
I did, however, find some other cards I might be interested in using.