Vilters
As you say climbing at higher IAS can help but it reduces the rate of climb and increases the time the engine spends at full power and so producing the most heat.
I can see this tactic being of use in aircraft that have cowl flaps where you can adjust the amount of cooling air but it is likely to increase the time it takes an aircraft with a fixed cooling system to get to cruise altitude.
What is clear it that no one tactic works for all aircraft so it's best to get to know the best tactic for the aircraft you are flying.