The phrase 'wast needed' can be replaced by several synonyms to make your writing more interesting and diverse. One excellent replacement is 'superfluous,' meaning something excessive or unnecessary. Another great synonym is 'extraneous,' referring to something that is unrelated or not essential. The words 'gratuitous' and 'redundant' are also viable alternatives with similar meanings. 'Surplus' can also be used in some contexts, indicating an excess that is not needed. Finally, 'expendable' implies something that could be replaced or removed without any significant impact. When writing, it's essential to use a range of synonyms to add variety and avoid repetition.