I'm not just a 2008 guy, I played TBC a lot.
No you cannot hold threat agains 4k DPS ST (even in Sunwell, have to make use of threat dumps) and I'm not sure why you mention Akama that is tanked by a NPC.
Having said that, there is just one ST threat capped spec in TBC - destro locks - and I'm really curious whether that will go away with TPS meta that will 100% emerge in high end runs.