the way i read it the chain is from the balrog, u get it one week and use it the next week, and as long as you keep killing hte balrog you keep getting the chain to use the next time
now what i learned lasat night is i think we on the right track
when we first go in we don't have to worrie about sending anyone right as thoes 2 worldeaters don't spawn till we kill the left ones. as for the left side,
as well as fan going down to pull one worldeater up, i think we need 2 LM down there as well till we get the second worldeater mezed, they seem to have a high resit to mez and 2 LM should make sure it gets mezed untill fan get the first worldeater pulled up,
for the rooms,
assuming the right room is the same layout as the left one with the switch right in front of you it should be easy enought to do. have a LM put down tar before the door opens, get a hunter to shoot the darklings to pull them, the LM mez the 1 worldeater hits the switch and then keeps the worldeater mezed untill the door shuts. he then runs back to the main group were the darklings should be dead by then
the left room is harder
will need a tank with aoe taunt
a hunter and a LM
oil just before the door opens, then the tanks runs in first to get the argo
once the tank is in and has argo the hunter does his aoe root at the same time the LM runs in and does the switch
with the switch done he runs out and does his aoe root and the hunter runs back to the main group
the tank and LM wait till the door shuts
reason being that the roots last up to 30 sec, but can break early if one breaks the LM can mez it if 2 or more break the LM can mez one and the tank pulls the other one back to the main group