First off congrats on what looks to be some lucky pulls!
Second thing. A cursory look shows that yes, you have some nice 5* heroes but have no depth… What I mean is that you have spent a fair but of materials and time on low-return strategy. My advice is to FOCUS ON THE 4-STAR HEROES
What that means:
Back to OP request:
I would suggest running the following defence:
Kingston → Vela → Ursena → Vivica (replace with Onatel when maxed) → Marjana
Levelling advice
If you provide your full roster, I can make some suggestions about who to focus on in terms of levelling priorities.