We probably don't need ANOTHER presence monitor but I made one anyway. I needed something similar to Presence Plus and Presence Governor but a bit different. Basically I wanted to be able to list a device that "if present means I am here" (Wifi sensor), but then be able to list a bunch of other ones that if N are present or N are not present then I'm here/not here. I don't know how much I really plan to maintain this, it was more for personal use, but figured I'd put it out there if anyone finds it useful!
Note: While I didn't use his code I did reference @bptworld's Presence Plus to make this.