Prove yourself
Arthur kept assaulting the two armies relentlessly while his scorpion girl kept ignoring everything and focused on hunting down the fallen energy of his.
This made the losses on her side mainly due to her stamping over many warriors along her way.
As for the other side, Arthur focused mainly there as the array had annoying self regeneration ability.
It took hours for him to finally crack this array. The other one cracked a long time ago and the scorpion just took as much as she could from his fire while the rest fell on everyone, killing them.
The moment the array broke, Arthur started to have his way easily in killing his enemies. This wasn't a surprise as the only barrier sheltering those weak warriors was gone.