At the moment, among your inventory, the only good thing to transform is the Windigo(torso on your second mech). If you want to myth the smartest thing, then the best option for you at the moment is to wait, upgrade Windigo, and then turn it into a myth
Windigo is one of the best torsos in SM at the moment. In terms of its characteristics, it surpasses both MPV and LPV.
Wait)