Harlequin Crest is a unique Shako. Besides its bonuses to skills, life, mana and damage reduction, Harlequin Crest (often referred to by the community as simply "Shako") also bestows a very high boost to magic find, which can be boosted by socketing the helmet with an Ist Rune or Perfect Topaz. Harlequin Crest is also fairly cheap to acquire via trade because none of the modifiers are randomized. It is a good all-around helmet for nearly any class.