Raid defense team - keep or swap?

Current line up:
Athena, Zeline, Gravemaker, Delilah, Sartana

5* heroes at 80:
Joon, Khagan, Elena

5* heroes nearing the promise land:
G.Panther, Alasie, Tarlak

4* heroes at 70 (don’t know if it’s worth mentioning them?):
Boldtusk, Kiril, Sonya, Hansel, Sabina, Tiburtus, Wu Kong

Have all 4* mana troops at lvl 11 or higher (except green, damn you RNG).

Any advice is appreciated. I’m currently in Diamond league, but I can’t manage to stay above 2600 cups.