Most posters are looking to find the cheapest way to travel the trains, and worry about buying a 5 day pass if they are traveklling only four days. The hate to waste that extra day.
In your case, and to make it easy, I'd seriously consider the Swiss Travel Pass. Don't buy tickets. Just get on the train. bus, boat, tram and show your STP. Very rarely, in back country corners of the country, it might not be good on some buses. And, on alpine transport, such as around the Jungfrau, it may only offer a discount. But, that's not on your list.
I'm guessing that, if you wish plan to stay a the Dolder Grand, counting pennies might not be critical for you. And, with your experience level, it will make life a lot easier. All your travel , including trams in Zürich will be covered ( need to confirm Pilatus...might only get a discount. They keep changing the coverage there.
And, since you are from the USA, as I am, you will be amazed at how well the train system ( as well as other public transport) works.
By the way, instead of Liechtenstein, if you really want to go to that part of the country or region, I'd take a look at St. Gall.
There is a bunch of stuff about it in this thread in my post on the 19th:
www.myswissalps.com/fo rum/topic/itinerary-advice-11#hHPB16DW9mqS6v8AAFc RTQ
Closer than Liechtenstein and a lot more interesting.