This is kind of a flexible survey. No absolute rules except you have to be self-limiting in terms of your selections.
In reading the new Difford's Guide to Cocktails, I was surprised by his "14 key Ingredient" list. The boldness of suggesting such a list, especially by BRAND, impressed me with its bravado (the whole dang book is an exercise in bravado to tell the truth). Agree or no, you could certainly do far, far worse than to take his advice.
So I ask you: If you were stranded on a desert island, what would be the spirits of choice to bring along? What would be the Go-To brand of choice for each? While I won't say you can choose only one base, etc. I will say that the more limiting you make your response the more interesting the answer.
Oh, and yes, this desert island has a glorious supply of citrus fruits and a strange ice lake - no Polar Bears, though, LOL. - just to get that out of the way.
To start I'll limit myself to one base and a few key other ingredients:
Noilly Pratt Dry Vermouth
M&R Sweet Vermouth