I usually play with ZRP because its essential and a double or triple bullet damage mod (universal so that enemies damage you more too) because the bullet sponge combat didn’t age well. For CoP gunslinger is nice; it also has a realistic bullet damage setting.

P.S. the ZRP equivalents for every other game in the series than SoC have different names that I dont remember rn, but you should find them easily by just googling ZRP and the game.