Attacking with Dragons draws you cards and can drop extra permanents for free, so combat turns into a steady stream of value instead of swing and pass. Focus heavily on early ramp and color fixing so the cost reduction matters as early as possible
B/W seems like a solid chunk of where the warriors are at, with red & green having a few options to offer
The card draw is all over the place, and while most of it is really good, some of them are less powerful in the deck, like Dark-Dweller Oracle in a deck with few creatures to sacrifice
Battlemages Bracers is a newer option that gives red decks redundancy for Illusionists Bracers or, in some ways, a superior option
#8 Bakis Curse (Homelands) Why is it bad
Clan Defiance It may not look sexy, but Clan Defiance is the best X damage spell in Gruul, and better than most Red options with its ability to shoot down two creatures as well as Blaze an opponent