I was thinking about faceting my shako for my trap sin but a couple people told me that Facets don't add to the damage of traps...is this true and is there a reason for it?

it doesnt traps is a well.. iono how to explain it doesnt tho it would work like sorc lightning best option is up it or shael that shako

traps are considered minions. IAS affects traps (for some reason?) and Facets do NOT because the negative dmg wont affect when ur traps strike, and the +dmg wont do anything.

first of all you cant up a shako...

second facets dont work cuz traps are considered minions

1. How do Traps and Rainbow Facets work together?

The -res and +damage on Griffon's Eye and Facets do not add to trap damage. With the exceptions of Fire Blast and Shock Web, the Assassin Traps are considered minions by the game. Your minions do not benefit from any -res or +damage your character has.

Note that Sorceress Hydras benefit from both Fire Mastery and Facets. This is explained by T-hawk:
Q u o t e:
The missiles fired by Hydra have a special-case check of their caster's "+% Fire Skill Damage" ability. That's why Hydra works with Fire Mastery and Facets. This check was added in version 1.05; before that, Fire Mastery didn't boost Hydra damage. Thats the link...
http://www.battle.net/forums/thread.aspx?fn=d2-gameplay&t=163465&p=1&#post163465

i ment UM it sorry

dont have to appologize for a typo but yes an um would be a good choice