No attempt is futile; everything serves a purpose. Suppose you are traveling somewhere by railway. In order to catch the train you will first go by boat from your village to Dacca, then descend from the boat with the help of a stick and get into a horse carriage that will take you to the station.
Although your aim is a journey by train, you cannot say that the boat, stick, horse carriage and so forth are of no use. Similarly, you should understand that everything you do in order to realize God is helpful. Nothing at all is wasted.
By whatever Name you may invoke Him, your effort will be crowned with success. The main thing is to cling to the Name with constancy.