In solution-focused coaching it is perfectly possible to do conversations without using 'standard' techniques like scaling questions and miracle questions. It is not strictly necessary to use these techniques. In fact, whatever situation you are in with your client(s) there will often be an abundance of choices in how precisely to proceed. There are always several things you can do at any point in a conversation. There are always many equivalent ways of phrasing responses and questions. Asking miracle questions or scaling questions may be a good idea but there are alternatives which may work just as well, perhaps even better. These alternatives may be variations on the same basic ideas. For example there are many many ways of inviting a client to start describing his desired future. Of course, it can be hard to think to learn these interventions and to use them effectively in conversations; I am not saying it is necessarily easy.
Having said this (that no standard technique is ever obligatory), I must add that scaling questions are a favorite of mine (and of many other solutionists). I use them often and enjoy how flexible they are and useful they often are which tempts me to turn my statement around and claim that at any point in any conversation a scaling question may be a good choice.
Thanks to Hans Peter Korn for triggering this thought.