Mustard / Mayo Combo Mix?

The author is a huge fan of deviled eggs and wants to create a pre-mixed deviled egg seasoning that can be stored in the fridge and used whenever needed. The author's typical deviled egg recipe includes a base of mainly mayo and mustard with boiled yolks. The author initially planned to mix homemade mayo, homemade mustard, paprika, and other ingredients together and store it in a jar. However, the author is concerned that the acidity of the mustard might affect the stability of the homemade mayo. The author is also worried that the mixture might separate or go sour when stored in the fridge. The author is looking for advice on whether it's possible to create a combo sauce from the start that won't affect the shelf life of the mixture. The author is planning to do some experimentation but wants to do some preliminary research first. The author is aware that homemade mayo doesn't keep forever, and is wondering if pre-mixing it with other ingredients will reduce its fridge life. The author is seeking feedback and advice from others who may have more knowledge on the subject.