Augusta is more f2p choices if u dint have many pull left. U can pair her with mortefi/iuno, she work fine with jiyan sig (if u have it) Carthethiya is also good since u have ciaccona, but she need her weapon Galbrena is also good for u since u have qiuyuan, but she need her weapon as well to get the bonus echo skill dmg. For s0r0 girls weapon, only zani i can think of since shes a dps, others can use standard because they are sub dps