Ridicious isn't actually as hard (in some ways) as Extreme.
Program Files\Stardock Games\Elemental\data\English\CoreDifficulties.xml
<AIDifficultyLevel InternalName="AIDiffLvl_Extreme">
<DisplayName>Extreme</DisplayName>
<AIEconomicRatio>1.5</AIEconomicRatio>
<AIFOWCheat>0</AIFOWCheat>
<AIHPRatio>1.00</AIHPRatio>
<AIStartingFundsRatio>5.0</AIStartingFundsRatio>
<AISovereignPointsRatio>1.0</AISovereignPointsRatio>
<AISovereignHPRatios>1.5</AISovereignHPRatios>
<AIIntelligenceFactor>1.0</AIIntelligenceFactor>
<AIUsesCombatMagic>1</AIUsesCombatMagic>
</AIDifficultyLevel>
<AIDifficultyLevel InternalName="AIDiffLvl_Ridiculous">
<DisplayName>Ridiculous</DisplayName>
<AIEconomicRatio>2.0</AIEconomicRatio>
<AIFOWCheat>1</AIFOWCheat>
<AIHPRatio>1.20</AIHPRatio>
<AIStartingFundsRatio>10.0</AIStartingFundsRatio>
<AISovereignPointsRatio>1.0</AISovereignPointsRatio>
<AISovereignHPRatios>1.0</AISovereignHPRatios>
<AIIntelligenceFactor>1.0</AIIntelligenceFactor>
<AIUsesCombatMagic>1</AIUsesCombatMagic>
</AIDifficultyLevel>
You want it harder? Replace the "AIDiffLvl_Ridiculous" with:
<AIDifficultyLevel InternalName="AIDiffLvl_Ridiculous">
<DisplayName>Ridiculous</DisplayName>
<AIEconomicRatio>20.0</AIEconomicRatio>
<AIFOWCheat>1</AIFOWCheat>
<AIHPRatio>2.0</AIHPRatio>
<AIStartingFundsRatio>200.0</AIStartingFundsRatio>
<AISovereignPointsRatio>2.0</AISovereignPointsRatio>
<AISovereignHPRatios>20.0</AISovereignHPRatios>
<AIIntelligenceFactor>1.0</AIIntelligenceFactor>
<AIUsesCombatMagic>1</AIUsesCombatMagic>
</AIDifficultyLevel>