i got the game recently. I had a really hard time grinding. First playtrow was very harsh. But second one was sooo easy. Want to share it. might make things easy for people.

My main goal was to farm Skills and money. And go full ATK based. It was more fun the first time i played. I went tiger. Dodge based. Was a mind game to counter people. This ATK build gets soo good you harldy have to chance your build.
I started by farming construction work. Did all the fights i could. Gym and roy, bar, league. Even if you lose you always get Skill points. Low kick and Skip Turn with get you easy wins. I keeped farming money and skill points. Only worked on Streight when i wanted to get Muscle Memory which requiers 4STG. But you can also just grind to level 2 and get STG Potion. And same for Muscle memory ll. at 8. Was the only two times i grinded at the start. With 4STG and Skip Turn i could walk with 200$ and criminals could not beat me. I legit wanted to lose fights to farm Skill points yet i was wining everything.
Farmed to get Closeline. End game i still use this move. Insane damage. Dodge/Closeline/SkipTurn/TormentorStrikes/Exauster is my build. you do miss but when you hit you hit hard! And keep making it easy to hit more AND drains stamina. with only 8STG was doing 26 damage xD

I legit think Strenght is easy mode. havent tried any Stamina builds. Heard its complex. Tiger was fun. I wanted to dodge a lot. But even with a lot of dodge skills it still struggles to dodge everything but its fine cuz then u would be unkillable i guess. This run was way less grindy with Streght build. I only grinded for hard fights or to get the Decay protect.