I got the shield for two reasons:
Firstly, it's cheap.
Secondly, I don't enjoy farming PvE drops for five characters.

Did that for the totem of the void, and that was enough for me.
To equip my shamans, I now go for badges, crafts, or PvP rewards.
I might consider farming heroic final bosses when my gear is at least S1-like in all slots.