I find a 7:1 largely sufficient on my stealth. Allow me to regulate the boat with one hand without the need to move the hand up or down on the sheet. The 6:1 I had before was a little to hard to crank hard without using my legs for help and tiring to keep uncleated.

I have a triple with becket on top and a triple with cleat on the bottom with a smaller block on the top of the cleat. Some old ronstan model blocks I believe.

If I ever need a new system I'd probably go for an in boom cascade. It's more work to setup right but it is cheaper to buy and cleaner.