Deciding adverbs are provided in this article. The words listed here are commonly found along with the verb deciding in sentences. This reference page helps answer the question what are some adverbs that describe or modify the verb DECIDING.
actually, apparently
consciously, eventually
exactly, finally
merely, quickly
simply, suddenly
ultimately
Hope this word list had the deciding adverb you were looking for. In addition to adverbs used with deciding, other example verb adverb pairings can be found on this site.
You can help by adding more adverbs in the comments. Thanks.