The two times I worry about heat is 1: sitting in traffic, and the urban fan has prevented the engine from ever going into split fire, but the heads still get darn hot.
If you have the Urban Cooling Kit fitted and the ECU programme that controls it, the engine will never go into Skip Fire as that feature is removed from the ECU. Only pre-urban cooling kit cars had skip fire.....and you certainly knew if it went into skip fire mod. The urban cooling kit is a big improvement and does a lot to keep temperatures within reasonable limits. Oil cooler are not needed in the UK, according to my oil pressure and temp gauge, never been over 120c even on hot days in traffic.