I got this idea from a post I read in the dungeon's and raids WoW forums.
Basically any warlocks in the raid should soulstone certain pallies (preferably ret and healing pallies). The pallies soulstoned should then cast Divine Intervention on the targets that get Mark of the Fallen Champion. The pally will die but he will be soulstoned, while the person who was marked should have the mark removed while still surviving so that it doesn't heal Saurfang by 5%. I haven't confirmed this yet myself but I just thought I'd share it if it works.