I need to say this: i'm argentinian and i really dont like most of the yerba tea blends
if you want something traditional i think you have to check the way we drink it. we use the "mate" or "porongo" is like a glass of wood and a metal straw (our "bombilla"). water is around 85ºC and you pour it, drink it, and pour water again.
if you want to do a blend, the best is to try with lemon, orange peel or mint leafs. There is people, like my grandma, that use herbs that make you pee or something for health and mix them with the mate. I never try because i'm lazy for that.
mate+citric or mate+mint are the bests for me, but always drinking with mate and bombilla <3