"Wert needful" is an old-fashioned way of saying "were necessary" or "were required". There are several synonyms for this phrase that can be used to add variety to your writing. Some possible options include "were essential", "were crucial", "were imperative", "were mandatory", "were indispensable", "were vital", "were requisite", and "were pivotal". Choosing a different synonym can help you avoid repetition and keep your writing fresh and engaging. It's important to note that when using synonyms, it's important to make sure they are appropriate for the context in which you're writing.