You have to understand Sian, it's not your fault. I'm quite dense. Ambiguous statements like "not too far one to the other", and "deal with the adds" only leads me to more questions, like:
Do they have to be within line of sight of each other or hidden from Vasella only? Do you want them as far away as you can, or do they have to be somewhat close? Do you KILL the adds? or just offtank them? Once positioned properly, do they require any changes of position throughout the fight? Is there a parallel world where I have the wherewithal to figure these things out for myself?
etc. etc. etc....
As I've said in other posts, I'm terrible with figuring mob strategies out for myself, which is why I keep hoping the new wiki functionality with spoilers will motivate someone to just lay it all out there for those of us who like taking the easy way out.