Can someone help me with my build please?

Hello, I would like to know how to improve my Mavuika build.

Things I want to do to improve her are: getting better flower(all cd/atk% if possible)

I also have the Ultimate Overlord's Mega Magic SwordUltimate Overlord's Mega Magic sword so I dont know if I should lvl it up from lvl 20 or if it's not worth it.

With the team provided below, my ult deals only about 360k dmg, which I think is super low. Maybe I just expect too much from this team...

Even the charged attacks(pyronado) deals only around 30-40k per hit...

The rotation I use is: Mavuika e first, then switch to Xilo and proc her E with NA, then switch to Benny boy and ult and E to recover some energy, fast switch to Citlatli to ult and then E and lastly switch back to Mavuika and ult and then do charged attack dmg.

https://preview.redd.it/0bmdqaot24ge1.png?width=2107&format=png&auto=webp&s=a24e5d15b50c470bd2c19c91e1fb2165db1a5dd9

The team I am using is as follows:

https://preview.redd.it/v4hbheve34ge1.png?width=2107&format=png&auto=webp&s=78a1e13c30a9b32b613e012f4397290e88652831

https://preview.redd.it/1i3cv6ru34ge1.png?width=2107&format=png&auto=webp&s=bfcae007314d32ef9cb75134e9e1ca0820b7c7ee

https://preview.redd.it/d8ebjo8v34ge1.png?width=2107&format=png&auto=webp&s=a93181a283112b1f8c849cee5e318d8b2439e171