Here is how I built my C if I remember correct. He is still young so it is kind of fresh in my memory.
Trained strength to 24 with 90% to 99% trained
Spent SP on strength at level 3 to cap it at 49.
Trained blocking/agility while taking strength to 68
I think I reached 68 by level 8 or 9.
I capped blocking a couple levels later. It also had 90% to 99% trained.
I trained agility and anything else while taking blocking to 74 by about level 20ish
So at level 20ish strength is now about 79 from level gains and blocking is 74. I train them both 1 or two more times to take advantage of the 90% to 99% training I saved and they are 80/75 strength/agility at level 20ish. Now they are done forever as level gains will take them into the high 90s by level 50.