Mobilising Armies

Is this worth doing?
I want a Berserker Ring (i)
As it doubles the strength the ring gives.

I was wondering, has anyone here done it and got the ring?
If so, how long did it take?

 

[dualimpact]

http://runescape.wikia.com/wiki/Mobilising_Armies

I think it says how long it takes to get the rings, as far as I'm concerned it isn't worth getting (i) rings unless you have a lot of junk you cant get rid of.