Let us craft Fusion Armors
A Fusion Armor provides 150 EP, or as much EP as 37.5 Basic Armors.
This would normally require an investment of 3 shards, 300 gold, and 5 minutes each; or 112.5 shards, 11250 gold, and 187.5 minutes, to create an equivalent amount of EP for enhancement.
I would propose allowing characters that have met a given criteria the ability to craft Fusion Armor for the cost of 125 shards, 100,000 gold, and 24 hours. This would give those at higher levels a reason to spend their money and use their shards.
Also, I'd like to echo the sentiment that matchmaking in the Arena is a little unfair at higher levels, where the Pay to Win players have a distinct advantage over Free to Play players. I have no suggestions on improvements because I don't understand how it works in the first place.