What are the Best way to unlock features in fighting games on Android?

I’ve been playing different fighting games on Android and noticed that many of them require a lot of grinding to unlock characters, weapons, and upgrades.

I’m curious — what’s the best way to enjoy the full experience without spending too much time on repetitive tasks? Are there any tips, versions, or methods that make progression smoother?

I’m mainly interested in games similar to shadow fight 2 where gameplay and upgrades both matter.

Would love to hear your suggestions!