With any luck, there are a number of synonyms that can be used to convey a similar sentiment or tone. For example, one might consider saying "if all goes well," "hopefully," or "fingers crossed." Each of these phrases suggests that there is some level of uncertainty or chance involved in the outcome being discussed, but also implies a sense of optimism or positive thinking. Other alternatives might include "in the best case scenario," "with a little bit of fortune," or "with some good fortune on our side." Ultimately, the best synonym will depend on the specific context and tone of the statement in question.