[Help][Team]-Building Priorities?

Hello, I'm wondering what team i should focus on making strong.

• Region:NA

• Hardest Dungeon you cleared was: Goddess of harvest in Starlight Sanctuary

• Help me with: Focusing on what to do

• Current Team: Lu Bu lead astaroth wicked lady king baddie dill sirius subs Ronia allies

• PADHerder Link or Box Imgurpadherder

• Do you IAP? I spent my itunes balance and may spend money in the future

I was lucky enough to start with Lu Bu as my first pull roughly 50 days ago.

I blew 25$ itunes balance on the PC godfest, along with about 40 stones i had gotten from challenge moding and clearing dungeons for the first time I now have more things than i know what to do with, and am looking for some guidance.

My current plan is to uvo RA to his L/L form, but I don't know how to do mythical friday dungeon with my current team, or if its what i should actually go for with what i have in my box. Any thoughts or guidance would be appreciated.