All 8 Legion Arms. 00:00 Left Arm of Steel 00:29 Puppet String 01:05 Fulminis 01:43 Flamberge 02:31 Deus Ex Machina 03:10 Pandemonium 04:32 Aegis 05:17 Falcon Eyes
Alright, best design and why. I say Flamberge because it looks like something a puppet warrior would have and foes great will a red outfit. Also it looks like an advanced Left Arm of Steel.
Idk I haven't played much so I haven't unlocked many but puppet string is crazy good for slingshotting around the environment or pulling enemies from traps, or ledges or getting close to them. The electric one is unblockable and has deceptively decent range and shock is a good status. The only other one I have is the falcon gun that I just got, killing mobs at a range is ok but I need to use it more to see how effective it is. Haven't used the flamethrower yet