Can resto shammies take a hit?

[Baltyre]

The debuff of this one is good enought to compensente the low dps ? https://classic.wowhead.com/item=12798/annihilator

Or it's only a choice for raid ?

Nevermind, seems bad.
Still, i wonder if i can make a Shaman Ench, who switch as Chain Healing Support when needed.
Something a little like that : http://i.imgur.com/mynRVDZ.jpg

I read that Sham Ench are bad, compared to War fury on a single target what % of the dps of a warior can i expect on pre raid stuff ?