Hi there.. 'Forgiveness' relates to meter speed for your clubs, the more 'forgiveness' the slower the meter speed, but with that comes lack of distance... 'Durability' is the wear n tear on your ball, thats life when u want a better ball... .. Being a 'Master' like myself, I would suggest you upgrade n get the Master G10 irons as they give u better height n distance than the pro series, plus there the best club for meter speed.. .. The ball is purely optional, get a few types n experiment.. .. good luck!