removing the 'check' or at least fixing it to remove the length of the options for less clutter as well as the log option.
Once clicking the partner option two options in the chat box will open up, being 'request duo partner' where the player would click said option and type in the user name of the player they wish to duo with. Restrictions being Regular irons can duo with classic/normal/regular irons, HCI can only duo with HCI, UIM cannot duo with anyone or can only duo with UIM.
the second option being 'previous duo partner' where when clicking the option with automatically send a request to your previous duo partner implying they do not have a current slayer task.
If duo slayer every does get implemented, some commands that could be added would be ::duo (insert player name here). If the player being invited does not have a current slayer task and is meeting the requirements to accept the slayer task, then they would both be on the same task.
More things to add to it, but I can't think of them atm.