Final Fantasy X Tips

Max Stats and Standard Sphere Grid
The Standard Sphere grid has the following numbers of nodes which raise your stats by four points;

Strength = 22
Defence = 9
Magic = 16
Agility = 20
Evasion = 17
Accuracy = 4
Magic Defence = 15
Luck = 2

The lowest stat any character starts with is 5 (except in the case of luck, where it's 17). Therefore, to max everyone's stats, you need 63 of each node at full power - i.e., raising your stat by 4. However, since there are some of those already on the grid, you don't need to clear and replace nodes 63 times; just 63 less the numbers above.