You need to do the amount of aesirs required for each level.

There is NO order like fire, ice bla bla. Only the number of aesir and do them fast. Its not supposed to run its 1 hour course before you do another aesir. 

got it finally,.. only took forever,.. sheesh,..

I guess, it will be interesting for you https://www.mylearning.org/stories/myths-legends-and-ghosts-of-leeds/1107.