Why not try both suits in SEA,HK,TW? You can just rent them with G.
I choose Akat over Arios, Arios need to be at close range at all time to be usefull. In that range if a rock catch you you'll dead in 1 set combo or at least badly injured.
Akat can fight in longer range, and the Yata skill will be usefull for tanking beam weapon.
Most of long range weapon are beam properties anyway.