I like so many that it's hard to choose. Mummification is much lower on the list. While I love tickling feet, I also like tickling everywhere else, and being able to do that more easily is nice. That and even if the intention is to focus on the feet, tickling elsewhere occasionally makes it harder for the feet to desensitize in some lees. I like a 4-point hogtie because it's simple and effective. It really keeps my wife immobile, and she is quite the squirmer. Stocks are really cool, but have never been the best setup for my situation. Maybe I'll get around to building a stock-like solution at some point. I like the idea of vertical stocks where the lee is laying face down with knees bent at a 90º angle so the soles of the feet are facing up, but for now, it's not very practical for me to use that at home.