You could remove experience entirely, but there's typically a sense of progression you want the player to have. Could have it where after certain points/events characters gain new skills, opening up more options during combat. Likewise with equipment and items.
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Yeah changing equipment and exploring the world to find it or get it from side quests would be ideal I think. Then there's no grinding involved so that's a good idea. But it makes me wonder then why have monsters in the first place? They'd have to serve some kind of purpose other than just be in your way. Maybe just give them item drops and cash for killing them that can be used for upgrading equipment ?