This is a bit of a necropost, and I wonder whether the OP is still interested.
But anyway since a lively discussion has been rekindled.
Simpler than a bridle is using a bow cleat with the snubber offset to one side. In my experience that will put some wind load on that side of the boat and dampen "dancing" at anchor.
Some people will run another line from a midships cleat and attach this to the snubber with a rolling hitch, to increase this offset. You then have an infinite range of adjustment for your angle to the wind, and you might find a sweet spot where the boat lies stably. I've never tried this (a certain amount of dancing at anchor doesn't bother me) but it sounds like a good technique.
That being said, I have never been at anchor on any sailboat that didn't dance at anchor. You shouldn't expect perfect stability. To get much better stability than you have now you will need some kind of riding sail (one of the advantages of ketches).
I recently anchored in a storm where I became concerned about chafe on the snubber. I ran the snubber over the second bow roller and belayed it to a dockline which I tied between the two bow cleats
. It worked well since the roller took out the chafe. The central pull of the snubber did increase "dancing" slightly, but it was worth it not to worry about the snubber chafing through in the night.
As to knots, I can't imagine why anyone would use a complicated and difficult to untie know like a Prussik for this purpose. The rolling hitch, in my opinion, is just made for this application. As someone mentioned, it provides you with a virtual splice to chain, which miraculously does not bind when you need to untie it. It seems to me that the gentle angle of the rope
inside the knot, which comes from the fact that it is assymetrical, would make it stronger than a Prussik, which makes the rope
pull over at a very sharp (and therefore weak) angle, IMHO.
If you are at all nervous about its strength (I don't know why you would be, but suppose), you can add a turn at the bottom, and you can add a half-hitch at the top. I sometimes use the extra turn at the bottom when I want more friction, usually in low tension applications like hanging my headsail sheets
from shrouds when the boat's not going to be used for a while. But that's for more friction, not more strength, and I've never had a totally normal rolling hitch slip or fail under any circumstances, including cases where the rope itself parted from strain. Along with the bowline I think it's THE essential nautical knot.