So far, on my alt (VIP only and cheap gem deals only), I have beaten rare and epic tiers and up through level 8 of legendary. Waiting for more world energy to try to finish legendary.
For rare tier, I used Belith, Valen, Bane, Ulmer, and Gan Ju. Antidotes, minor mana, arrows and axes.
For Epic, the only colors I can double a 4* are red and purple. I left out the reds and used Sonya, Cyprian, Wu, Rigard, and Caedmon. Medium mana, arrows, axes and bombs
For legendary, I’m using the same team as epic, as the only 5* I’ve even started is a 2/60 Leonidas. I just got Isarnia from the event summons and Domitia from my TC20, but haven’t started leveling them yet. If I struggle dealing enough damage on the last 2 levels, I may replace Cyprian with Leo. Mana, bombs, dragons, and maybe revive scrolls
Edited. Took me 2 tries, but I finished Legendary with the above team of 4/70 4*s