Talk:Charlotte/@comment-125.164.203.34-20140822043306/@comment-24.12.255.17-20140822212632

Fastener isn't that great, imo. Only 50% more damage than a typical UR buffer. Critters are the way to go.

http://valkyriecrusade.wikia.com/wiki/Machinist

is probably what you are looking for. She is also still available in premium/ultimate summon. Getting her is an entirely different matter though. You can also use the FAW from the last event if you have her HSR.