Those would be cool combos for a different deck I think. I have a pretty solid base for a R/W deck and don't see myself adding green or changing things that drastically. It just wouldn't even be close to the same deck. Also,
Cartouche of Strength makes the fight a creature that the opponent controls. This deck doesn't have a large amount of mana ramp, so I think I will stick with
Shivan Meteor, but if I make a R/G deck, I like that combo.