I personally like to use 2 ten siders. Unless I play My Oath of druids/Serras Avatar deck, then I need like 5 or sic ten siders. But I also use life counters of all sorts..depends on my mood. And I always have an extra set of dice for those tournament paleys who say " I dont have anything to track my life" And I say "here use these * handing them 2 ten siders to use*"
But even if they do keep track of thier life, I am keeping track of it as well