The method that feels more natural is stick for ROD and throttle for speed. This however is not the correct way and certainly not the easiest way.
If in fact you approach it the OTHER way you'll find your approaches FAR more accurate and speed control very easy indeed.
There is a definite delay in ROD control when using the power for this but once this is compensated for, thje numbers can be touched down on really quite easily.
I think the reason the ILS approach is easier with the principle reversed is that there is no visual reference on an approach in cloud.