Each of the first 4 can play a single master in a tournament and win the thing, in any field, if played well. This isn't true for 10T, NVB, or Rez, presently. And, generally speaking, as an example point, when we recently played in the largely-attended Bragging Rights team event up in CT, it was very easy to deal with teams who chose not to bring Guild/Grem/Arc/Out, b/c the match involving Rez or 10T or Nvb was one where they were on the back foot from the first flip. It was a visible handicap. $.02