In what order did the Organization XIII members die

The first was VEXEN who was killed by Axel in Castle Oblivion.
LARXENE was second, and was killed by Sora.
Riku killed LAXAEUS in the Castle Oblivion Basement, making him third.
Fourth was MARLUXIA in Castle Oblivion by Sora.
ZEXION was fifth to be killed and was absorbed by Repliku in the Castle Oblivion Basement
Not actually being a nobody XION willingly let Roxas absorb her, making her sixth.
In Hollow Bastion/ Radient Garden, DEMYX met his fate by the hand of Sora being seventh.
XALDIN was killed by Sora and the Beast in Beast's Castle, making him eighth.
Saving Sora, AXEL performed a Suicide Attack and became ninth to die in a portal to The World that Never Was.
The Castle that Never Was became the final resting place for XIGBAR by Sora, being the tenth to fade.
LUXORD lost the game being the eleventh to lose in The Castle that Never Was by Sora
The moon couldn't help the dramatic SAIX who was twelfth to disappear by Sora
As the main villain, XEMNAS was last to lose to the light, being the thirteenth.

ROXAS joined with Sora, so he never died, yet no-one knows the fate of the nobody.