Before sailing to the Isle, just make sure you do everything for Triss, everything for Kiera (and her Friends with Benefits achievements), everything for Dandelion, everything for Zoltan, everything for Roche/Dijkstra (progress for Assassin of Kings), and everything for an Craite's subplot (for Kingmaker).
Basically, like I said, do everything possible for everything and everyone before sailing to the Isle.
Relatively short and easy, for most of it. Took me around 6 hours to get 950G, some of the levels can be quite tricky to get gold on or to complete without dropping a ball. Some of the later levels you'll have to drop some balls in order to save time for the gold.
Then there's the grind to 100,000 cubes hit. When I had every other achievement, I was only at 33K. Managed to get around 10-15K an hour with level 8, took roughly 6-7 hours for that as well.
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