The best knot is the one you tie the best under trying conditions. I use the palomar for that reason. For braid to mono leader connections I use a loop to loop connection using double spyder hitches.
If your picky you can take a lighter and melt the tag end a bit, but it never seen it slip...
~..~..~.. ><((((º>
Things done at the last possible minute are done with the greatest possible information. Procrastination is, therefore, the most efficient means of doing things.