The reason I ask is because there's a specific article in Gamefaqs (under the name of "Stat Mechanics") that gives a list of Tick Speeds for each "band" of Agility. This maxes out at 170 Agility. Hence why I'm pretty sure there's no point getting it above this value besides asthesic purposes (much like having more than 98 Vitality is useless in FF4).