After that, it's a move action to keep it going in a straight line (back and forth?) for a round... which she'll use if possible to make sure there's no chance of anything following them that way.
It has only one direction so it would keep going in whichever direction it was first sent at.
What happens at each round is per round spent concentrating, so if you use it on round 6 you'd get the build up from round 5, not the 6th.
Its a concentration thing, so if something happens to Ama and breaks her concentration before it is used, she loses the whole damn thing.
TreasureMesata has been earned but no amount has been specified.
Otherwise, that is some
serious loot.
Here's my thoughts on it all:
Zaxe: Works well with Mao, Ama and Baha.
We all already have a better weapon as far as base damage goes.
Mao has a lot of stats based on Str so it works well with her.
Ama and Baha could perhaps use a weapon with the Power property when they are not in a mecha.
Baha doesn't seem to have a weapon with which he can use along with his natural weapons (as a control rod) so any weapon could help.
Vistburn: Very good for Ama and Baha. Rending used out of a mecha is nice when you don't already have an equivalent ability
Better Will saves is good for them and the bonus Con is pretty awesome for all their abilities.
Vol Scale: Pretty good for Mao, Ama, Baha and Kath.
Base damage is huge and so is its base crit threat range. If a way to have it increase to match Baha or Ama's larger sizes the base damage would skyrocket. Using crit threat range increasing sources to further increase the threat range would make easier criticals.
They can all benefit from it when using many attacks. Shaken debuff benefits everyone. Charisma bonus is better for Baha mostly and nobody would spit on extra HP.
Alba Laser: Seems made specifically for Kath. She can always take more Dex, speed and yet an extra attack in a fullattack by juggling through her weapons.
Alba Obside: Mostly good for Baha and Hugo, though almost everyone could greatly benefit from being able to discharge a maneuver along with an attack.
So here's my suggestion.
Zaxe: Mao
Vistburn: Baha
Vol Scale: Ama
Alba Laser: Kath
Alba Obside: Hugo