1-35 Agility, use Gnome Stronghold course.
35-40 Agility, use Barbarian Agility course.
40-52 Agility, use Brimhaven Agility arena.
52-85 Agility, use Wilderness Agility course (if you get tired of dying, you can use Brimhaven to 85) Also remember not to bring more than three items.
85-90 Agility, use Gnome Stronghold Extended Agility course.
90-99 Agility, use Barbarian Extended Agility course.
Then you'll have one of the best Skillcapes in the game. Congrats if you actually make it this far. :]
35-40 Agility, use Barbarian Agility course.
40-52 Agility, use Brimhaven Agility arena.
52-85 Agility, use Wilderness Agility course (if you get tired of dying, you can use Brimhaven to 85) Also remember not to bring more than three items.
85-90 Agility, use Gnome Stronghold Extended Agility course.
90-99 Agility, use Barbarian Extended Agility course.
Then you'll have one of the best Skillcapes in the game. Congrats if you actually make it this far. :]