I did a fun one on immortal level with Babylon. Tradition of course, but then full honor for the gold you get when you kill a unit. This solves the huge problem of income as a single city. I coupled this with freedom so I had 8 free units. I ended up affording, fleet airforce, and troops. Quality over Quantity of course. At the end my Stealthbombers were my main source of income
I'd advise the last policies to be aimed at a cultural win. Exactly how and when you finish the different trees is something that can surely be discussed. I had some piety and finished Honor when I "started needing gold", and I should have done it earlier I found out as it helped a good deal.
I settled generals in Citadels as a perimeter defense too, and this is a good idea on high levels where A.I. will attack with alot of units. I also settled a good deal of early scientists and a few Engis, as I could only have 1 GP in my city and the rest could be snatched up by warring units, couldn't really keep them for 100s of years.
The whole approach was pretty actiondriven and pretty fun. Different from the "click next turn OCC".