Hi, guys. I have uploaded my save file where I have completely rebuilded the whole sphere grid. This means that every node that does not give +4 stats has been removed and replaced with a stat node that does give +4 to stats. All empy nodes have been filled too.

Stats for the all character are arranged around this build:

-Strenght, Defence, Magic, Magic Defence: 255
These stats give benefits for every stat point so they are maxed.

-Agility: 170.
I have verified from many different sources that having more than 170 agility does not give you more turns. 170 is just as good as 255 so that is why it is 170 in this file and you get more nodes for other stats. "Haste" is a different matter and does increase your turns even more.

-Luck: 230.
230 is most you ever need to never miss any enemy and to be able to land critical hit, every single time. Having more does not benefit you in any way. This is why it is left at 230.

-Evasion: 60. Combined luck and evasion needs to be 290 to be able to evade every possible attack in the game. If you get hit, the attack is not possible to be evaded. This is why evasion is left at 60.

-Accuracy: 10~ Luck completely replaces accuracy so accuracy is not needed at all. All characters have their initial accuracy and it is not possible to make this any lower.

MP: 999.

Rest of the nodes give HP.

Save files:
https://www.dropbox.com/s/vh7txtkyjrydc1n/ffx_003?dl=0
At Besaid when you first gain access to Lulu, Wakka and Yuna. The characters that are not leveled in this save are Auron, Kimahri and Rikku. If you choose this save, you need to level those characters yourself when you gain access to them. It is very time consuming process and takes like one hour for each character with bot activating nodes with master sphere.

https://www.dropbox.com/s/h85nvqc4bmokdb8/ffx_004?dl=0
At beginning of the mi'ihen highroad when you gain access to Auron, just after the Blitzball game and the laughing scene. Only Rikku is not leveled in this save.

https://www.dropbox.com/s/ek40wo5d1bridb7/ffx_005?dl=0
At the Moonflow, just after getting Rikku. All characters have their sphere grid maxed.

Have fun skipping the gameplay and just focusing on story and/or just collecting achievements.

I recommend you play the game normally until mi'ihen highroad and then load my save if you wan't to go full cheat.

Location for save files:
Documents\Square Enix\FINAL FANTASY X&X-2 HD Remaster\Final Fantasy X