Rev kits are the best way to free up your valve train and keep it under control using lower spring pressures at the valve. Lifters last twice as long with them. The issue is the push rod angles on most engines are too great and do not permit the install of them on many engines. If you have one, and run the set up by your cam manufacturer, they will be able to inform you what spring pressures you will require at the valve and in the valley. Don't be scarred of the rev kit. they are worth looking at if you can use one.
But you don't need one for that RPM unless you want to use one. Springs are a lot better now a days and are very reliable which makes the rev kit less attractive for most engine builders.