Strength: Armored Zombies, monkey guards, or bandits.
Magic: Plank make.
Range: Chinning at Chaos tunnels or Ape Atoll Dungeon.
Hp: Can't really train this skill, after all the skills above, either do chinning to 99 HP, soul wars, or pest control.
Note: The technique to 99 magic are high level, I can't give you proper help if you don't list your stats.