KillWonder

How do I edit the spawn ratio of the existing mods? I find the Island a bit too overcrowded with animals and enemies for my liking. If anyone could pls assist me with this I'd be very grateful. Mods as Ziggy, Rebalanced, Explorer and Poor Jason, any of these would be the perfect amazing mods for me if it only wasn't for the spawn increase ratio they all have. Perhaps someone could make any of these so the spawn ratio is the same as in vanilla and upload it for me pls? Thx.