Hello!
The number of oil/Li deposits depends on the zone size and configured spawn density.
As you intend to have a small map, I would suggest overriding the spawn density for the oil/Li deposits by including the override scripts into your map's MPK distribution.
Edit these two files:
Core.cpk/Scripts/Zones/Scripts/Resources/SpawnDepositGeothermalSpring.cs
Core.cpk/Scripts/Zones/Scripts/Resources/SpawnDepositOilSeep.cs
Find the line:
spawnList.CreatePreset(interval:
and change the interval constant there. The smaller the value, the higher spawn density you will get (the density is calculated as "1 / (interval * interval)").
Experiment with the numbers until you get a desired number of the deposits while using CryoFall Editor -> F8 -> Zone tool -> "Invoke select zone scripts" (press it several times as each call will spawn only a single node per biome).
Regards!