That is the way it is being done now. But this method is not written in stone. There is no reason that the Seanchan could not use a special form of brainwashing only on captured AS that made them see other Seanchan as "sisters" and thereby mostly avoid the oath against killing
The thousand year old damane tradition is so set in stone that any changes to the winning formula don't seem all that likely.
The Seanchan would also have to understand how the Oaths work to realize how the word "sister" could be used to their advantage. With the huge amount of suspicion and despise on all things Aes Sedai the Seanchan would have a hard time finding the loophole and believing it could be used to their advantage. I think.
It's not like they would need to do it to every damane, or for that matter believe it themselves. All they would have to do is make the AS-damane believe it. Whether they would be willing to do it is ofcourse up for debate, but it would allow them to use captured AS as weapons so its not beyond doubt.
True
Not that uncommon for things to go off-topic I have noticed. Atleast we are still mostly on the Seanchan vs Aes Sedai thing. 

I see no problem in digressing, I do it all the time. But if this regresses into a "Who would win in a fight"..LAN IS AN UNSTOPPABLE JUGGERNAUT. Just so you know.
The White Tower has all the tools to defeat the Senahcan...
03/08/2010 10:32:03 PM
- 1591 Views
Re: The White Tower has all the tools to defeat the Senahcan...
03/08/2010 10:53:38 PM
- 1027 Views
Why not take an oath...
04/08/2010 12:09:46 AM
- 911 Views
or just adapt the one power as a weapon oath to include a sister's freedom as well as her life
*NM*
04/08/2010 01:45:43 AM
- 378 Views

Perhaps they would die?
04/08/2010 09:10:42 AM
- 1051 Views
Re: Perhaps they would die?
04/08/2010 01:43:02 PM
- 883 Views
Re: Perhaps they would die?
04/08/2010 07:14:24 PM
- 777 Views
Re: Perhaps they would die?
04/08/2010 07:44:10 PM
- 800 Views
Re: Perhaps they would die?
05/08/2010 08:33:18 AM
- 752 Views
Re: Perhaps they would die?
05/08/2010 01:15:47 PM
- 773 Views
Re: Perhaps they would die?
05/08/2010 04:33:25 PM
- 838 Views
Re: Perhaps they would die?
06/08/2010 12:02:16 AM
- 815 Views
Re: Perhaps they would die?
06/08/2010 08:51:58 AM
- 720 Views
they can't
04/08/2010 12:54:46 AM
- 911 Views
Re: they can't
04/08/2010 02:27:45 AM
- 908 Views
Re: they can't
04/08/2010 07:09:45 AM
- 873 Views
Re: they can't
04/08/2010 02:44:10 PM
- 808 Views
read the oaths again
04/08/2010 08:15:24 PM
- 847 Views
I don't think #1 is as simple as you say.
04/08/2010 02:22:25 AM
- 810 Views
For the most part, they can only defend themselves...
04/08/2010 10:59:23 AM
- 994 Views
Re: For the most part, they can only defend themselves...
05/08/2010 01:17:44 AM
- 836 Views
I think the BT would wipe the floor with the damane on their home turf
05/08/2010 08:19:38 PM
- 758 Views
Re: I think the BT would wipe the floor with the damane on their home turf
05/08/2010 11:57:43 PM
- 793 Views
Whoa whoa whoa!
06/08/2010 03:07:34 AM
- 806 Views
I actually think the opposite: the damane would wipe the floor with the BT
13/08/2010 11:27:21 PM
- 812 Views
My thoughts on the damane...
05/08/2010 04:11:35 AM
- 762 Views
How exactly would Egwene learn where the Damane are kept?
05/08/2010 07:57:55 PM
- 1008 Views
Interrogate the Damane.
05/08/2010 10:32:17 PM
- 711 Views