I can advise you to join the GlobalLFF Channel
And you will get ample opportunity to do endgear quests instances.
To join you type:
/joinchannel GlobalLFF [return]
To chat in this user defined channel, you first have to type the command:
After this, you are in User Chat channel 1, which would be normally the GlobalLFF channel.
When you log in, watch your screen and you will see a message which channel is active.
It works pretty the same as the LFF, Global or OOC channels.
To quit a user defined channel, you have only to type:
/leavechannel [channelname] [return]
So, for leaving the GlobalLFF channel, you have to type:
/leavechannel GlobalLFF [return]