How can she deal with Penny's skill?
As an android created by the Atlas Military, Penny is an overwhelmingly skilled fighter. During the Vytal Festival she effectively made it to the semifinals on her own despite the competitors being some of the most skilled fighters that the four Huntsmen Academies had to offer, with her other teammates only being there as stand-ins so she would have a team by the rules of the tournament. She is skilled enough to match Pyrrha Nikos in combat and even put her on the defensive and disarm her, with Penny only definitively losing the fight due to Emerald Sustrai using her Semblance to manipulate Pyrrha's already poor mental state into accidentally using her Semblance to dismember her.
After being reconstructed and upgraded in Atlas, Penny's skill capacity was further increased to the point that she could match Cinder Fall in combat alongside Winter Schnee, only being outmatched when Cinder utilized her Maiden powers, later beating Cinder in a one-on-one fight when both had their respective Maiden powers. Penny alongside Bann Belladonna also fought and outmatched four of the five Ace-Ops simultaneously, with them being forced to fall back at the end of their fight. In addition, despite having the Maiden powers for the shortest time out of any character, Penny had a near instant proficiency with them due to being an android, allowing her to learn how to use her powers more quickly than other Maidens and easily copying attacks she had seen from other Maidens like Cinder and Fria. Is capable of using multiple elemental attacks with her Maiden Powers all at once even minutes after becoming human, as her Elemetal Afteran Magic lets her do whatever she thinks she can do and each elemental ability requires a different thought, this means Penny can effectively multitask, something not not possible for the human brain.
Penny possesses a masterful level of skill in wielding her weapon of choice, Floating Array, a highly complex series of remotely controlled swords directed by communicating with each blade in order to manipulate them. She can manipulate each individual blade with just a thought or a wave of her hand, altering the configurations and formations of the blades at will to counteract incoming threats, easily utilizing it as a close, mid, and long range melee weapon and a directed energy weapon for overwhelming offensive purposes, as well as a shield and grappling cables to enhance her defense and mobility and thrusters to enhance her mobility and physical capabilities simultaneously. She can utilize multiple forms of Floating Array simultaneously, attacking with a mix of swords and lasers from multiple angles as a means of keeping an opponent constantly off balance, and can attack with enough precision as to cut a Bullhead in half with her lasers without harming any of the passengers.
Not to mention being comparable in skill to characters who are as skilled or more skilled then End of OG Dragon Ball Goku