Here's my first post and my own find:
As a shaman, enter and instance, spawn some totems and leave inst. - totem buffs will remain on you. Repeat that with other totems. Doing this u can have all totems active on you simultaneously.
You can inv ppl to party to buff them that way and when they leave party buffs remain on them. Example: buff ur Lvl 1 priest or lock with +100 spelldmg totem
If u want to do it only for yourself you dont have to go instance, you can do it alone entering pvp shop in Old Town.
This works on Wow Crack, I don't play other servers.