I think you can enjoy the same game if you don't spend cash.
I've gone over it a few times but it is always a popular topic.
I started non-iap with a 4* Valk roll. Farmed up my own Mermaid, Dryad, Naga, and got Succubus from a PAL roll. Leveled/evolved my Mermaid to a 5* Siren. When the...