What i finally ran with, based on the best results was:

I installed OS and WoW on the SSD, everything else on 1gig seagate.

I used keyclone to link to ONE instance of WoW on the SSD, no symlinking just 5 instances of Wow
from the SSD and....

It rocks!!!

No following breaking in major cities, going thru potals takes under a second and game runs smoother.

Now I can play in Northrend without any issues!

Thanks Patriot!