Seiron HD- Builds, Tips and Gameplay

I got this aura air bot from weekly, but I have very few ideas on how to build it or use it. I'm just asking for tips and builds for Seiron and how to use it properly in arena. I'm interested in this bot because it's different, so I gave it a shot. So please halp.

Currently, I have the HD on a Brachius. It has a smaller hit box and higher capacity(by a tiny bit) also not to mention moving burst.
The problem is that Brachius has very low HP and lacks the Broad Radar the SERION has. After taking into consideration, I chose Brachius BD because it looked better.

My Current build goes like this:

Spoiler:

:

Please Help with some suggestions please

And should I use Air loop or Accel Roll? (I think that airloop is somewhat better)

Force + speed tunes on the HD, hop carts and blitzelt bs very highly recommended.

His tgh is pitiful, so stun regain probably won't help much.

koicalc Seiron has something like 30 less capa than he actually should too, keep that in mind if you're still using it.

Mkay, what about handheld weapons, any suggestion

Something cheap to farm WDs and grind your WB gauge with. Handy Mag, Particle Mod, WBGM, etc.