I actually think dominance trumps all then comes everything else. If both players are tied then I go with (1) dominance, (2) head to head, and then (3) tournament record. This is why for me Djokovic is top dog in Australia even though they are tied in titles. When Djokovic reached 6 titles there, Federer was on 4 titles even though he had a 6 year advantage. Djokovic won 5/6 so he was more dominant and he leads the head to head 3-1 so for me, he's proven he's the best there. Now if both players are tied in titles and neither was dominant like Murray and Nadal at Wimbledon, then I go with head to head and tournament record/consistency. In that case, Nadal clearly is over Murray there. Now if we are looking at Djokovic and Nadal at USO then I look at head to head which is 2-1 in Nadal's favor but then Djokovic's tournament record/consistency is so far ahead of Nadal's that that one match win is not enough to offset it. Therefore when it comes to Federer and Djokovic at WTF, if Djokovic was to in fact tie Federer, I would go with Federer. They both were about the same in dominance. Djokovic won 4 in a row and Federer won 4/5. Slight edge to Djokovic but pretty close. The head to head is 3-2 in Djokovic's favor but Federer's consistency there has been excellent and he has a better record as of now. So, Federer would have the edge over Djokovic.