I have completed all areas of the game 3* expect from chp 19 heroic 3rd stage onwards, and floor 29 onwards on sky fortress. I simply cannot advance without dc or 7* cs heros. I ts just not possible.
I've read the reddit community page and this is what they recommend:
Ophiuchussa [The Salty Mod] 7 points
7 months ago
edited 7 months ago
Here's what I used (normal mode).
All stages up to 18.2 = Mirielle/Skin Valan, Sylphi, Gremor/Osiris, Nilya, Tsuki. Standard magic bomb teams + a slowndown or speedup tank will kill the OHKO bomb goblins before they can do anything, and the soldiers that absorb phys attack will be harmless. This is true for a lot of these stages.
18.2.1 - Same team, minus Tsuki and plus Vulko. Valan is necessary because the Magnus will OHKO your own team, Vulko is needed because of the high attack power needed to kill the anti-magic golems, the magic users are to deal with the bomb goblins.
18.2.2 - Same team works. More anti-magic golems.
18.3 - Same team, minus Nilya and plus Jasmine.
18.3.1 - Skin Valan/Mirielle, Sylphi, Gremor, Jasmine, Tsuki. No anti-magic golems. First try, not even sure Jasmine was necessary.
18.3.2 - I guess Theonis is getting released soon. Used Skin Valan, Vulko, Sylphi, Gremor, Jasmine.
18.4 - Skin Valan, Vulko, Sylphi, Gremor, Sumiko.
18.4.1 - Skin Valan, Sylphi, Gremor, Sumiko, Tsuki
18.4.2 - Skin Valan, Taurus, Sylphi, Gremor, Tsuki
18.5 - Skin Valan, Sylphi, Gremor, Nilya, Tsuki
18.5.1 - Skin Valan, Vulko, Sylphi, Gremor, Nilya
18.5.2 - Skin Valan, Sylphi, Gremor, Nilya, Tsuki
18.6 - Mirielle, Sylphi, Gremor, Nilya, Tsuki
18.6.1 - Skin Valan, Vulko, Sylphi, Gremor, Nilya
18.7 - Skin Valan, Mirielle, Sylphi, Gremor, Tsuki