can you enjoy the game as much without using real money?

[TaigaUC]

Saiki units are easy to get now.
Just do the recommended quests every day, to get keys for bonus quest.
There's a fairly high chance of getting Saiki from the bonus quests.

I'd say the main benefits to buying AC would be:
- Buy extra item pack slots, so you can pick up a ton of stuff and get into another good run quickly, instead of wasting time sorting crap.
- Buy extra Mags, if you want to play multiple styles on a single character. Otherwise just make a character for each major attack type (S-ATK, R-ATK and T-ATK).
- Buy extra skill trees, if you need them (eg. optimal Force/Techer has trees for each element type, Braver may need Bow tree and Katana tree, Techer may need Wand melee tree, etc).
- Able to purchase 11-12 star stuff, but you can get 3x 12 star passes from the titles for doing XH.
- Able to get into populated blocks more easily, but this is mostly only useful if you want to play with certain friends.
- Buy AC scratch and sell that to get lots of in-game money easily.