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You can consistantly beat a tier 1 deck without one. Point and case, any homebrew cant be classified as a tier 1. I have a mono white tokens homebrew that i use frequently that kicks butt at fnm and consistantly beats the tier 1 decks run there. I beat boros burn and eldrazi tron back to back one day beat deaths shadows and affininty on other occasions as well. I lose of course at times, but nothing satisfies me more than beating a competative net deck with something i pieced together at home. Not all my deck ideas are winners but i have 4 or 5 decks that i can guarantee to do well with any time i go play competitive modern. And on the bright side, no one is ever fully prepared for homebrews.
The important thing is that you have a deck that you enjoy playing.