Pure has a point, they are very crowded. When you get 100+ Combat, and have a set of Karils, get a Zamorak Spear or Saradomin Sword and kill Waterfiends. You get tons of Crimsons there. It helps a TON to have a Bunyip as well. Just look up a guide here or Runescape forums on what to wear, what inventory should be, ect.