Build made for defense missions and specially useful during Ambulas bosses or even Ambulas sortie.
The keys are strength and armor. You don't need too much duration and efficiency increase is anecdotical. Range however is important in this build, you don't need a too big bubble but neither a too small. The bubble will stop all the bullets (including yours) from coming inside, so if the globe is too big, it will work against your team.
Armor and strength are key, as I was saying because you need the globe to be resistant, as much as possible. So higher armor will reduce the damage it takes while high strength will increase its HPs. With this amount of strength, you can also trust your Avalanche to clean most minor enemies around the globe in no time, and by detonating the globe (shooting the 1st skill) it will cause a good AOE explosion.
The globe will have a few seconds of invulnerability where it will absorb the incoming damage and will add it to its HP bar, so cast it in the middle of a fight or when an enemy (for example the Ambulas' Capital Ship) shoots the beam and you will have an insanely resistant globe. Recast in the same place and your globe will include the previous' HP to itself making it even stronger.
The globes in this build are insanely resistant, so remember to destroy them when no longer needed (for example after the ship takes the ambulas) or you will find yourself shooting to a wall more often than not.
The limited radius makes this build not good for nuking, but being so tanky, will give you a frame that can survive a lot of punishment before dying.
You can change [Carnis Carapace] for the augment [Icy Avalanche] to make something similar to [Rhino]'s Iron Skin but with the enemies that you hit with avalanche. For every enemy hit, you'll gain a 60hp coat of ice that will absorb damage. Good too when you want to help a party survive. By recasting avalanche you will refresh the ice coat on you and your allies.