11 string tuning

[Tony Russell Davis]

Here's the thing - I have a D-11 Sierra and want some ideas what to tune the extra string on E9th. At the moment it's a low E with no changes attached.
So there's the challenge. What do you think would be useful?
By the way, the C6th was an easy choice, I have a high G at 2 and a D on string 1.

[Ken Byng]

Hi Tony
There are a number of options. Personally I would keep the low E and lower it to C# on my A pedal.