Without commenting on your driving style, from what I remember you might want to consider an “H” rated tire. Tire Rack lists only one for your Ford. I have a set, they’re fine.
tirerack.com/tires/tires.jsp?tireMake=Pirelli&tireModel=Scorpion+STR+A&partnum=57HR8SCORSTR&vehicleSearch=true&fromCompare1=yes&autoMake=Ford&autoYear=2008&autoModel=Expedition 2wd&autoModClar=XLT