Honestly, sides the helm + a little coloration I think that S6 is a very strong looking set. So, I took the liberty of making a few changes- Gems to red (ARENA IS BLOODY!!!), a custom red tabard, and different helm options.
One is a standard plate helm, made from components of the existing helm. Another is a mail coif that actually looks like a mail coif, supplemented by the existing helm elements, simply spaced wider. The third is the plate helm again, this time with the classic OMG GLOW that always accompanies these armor set modifications.
Either way, this looks like a battle-ready set o gear that actually looks like armor- I for one look forward to it.
Edit: Fixed bottom pic
Enjoy.