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If possible, increase your Cavern of Souls count to 4. It's expensive I know, but its amazing. My list is here: Boros Humans. I lean more heavily on Thalia, Guardian of Thraben than you do, she's turned out great in every matchup I've had. Gives Delver fits, slows down board sweepers against control and ramp, slows down everything from a Rampant Growth to a Sword of War and Peace , and blocks Strangleroot Geist all day like a boss.
What you may want to do is 17 damage by surprise in one turn.
If you're truly all about attack, then try some of these Hasty tricks out. I have seen them in action, and they are explosive.