As for the earth element was Haldor because even though it wasn't his main element, you couldn't compare the rank 4 to someone in the '30s.
The main reason for this thought was because of the large gap between them, but only Blake's team knew the reason why he was still in the same rank was that he was still in training.
As for the lightning element, they would have given it to Blake especially after redirecting the lightning during their match with Owen's team, but they had to give it to Damon's team.
Not only did they have 2 lightning users, but Camilla was from the Karius family that was known for their lightning talent, so she was at least meant to be on par with Blake.
The only reason they were given the win in the fire element was that they had 3 fire users, but if not for Luciano they would have said it was useless because of the presence of 3 submergers.