First off Transpose is amazing at any level for example when i start a fight Blizz III -> Thunder II -> Fire III -> Fire I Spam -> Transpose (when out of mp) -> Thunder II if I don't proc if proc'd then use Blizz I -> Fire III -> Fire Spam. When a new phase starts and I have lost all single target rotation and need to reapply thunder start over. The reason for thunder II as even though its less dps and doesn't last as long the idea is ill proc and use thunder III. The reason I use transpose over Blizz III as Blizz III compared to Blizz I when full astral stacked is not a lot of dps difference. Also by hitting transpose I don't have to use any blizz spell if I have proc'd a thunder as I can hit the proc and start my Fire III and reach full mana before I get it off. The idea is to have maximum mana usage as Fire is by far your dps and blizz is terrible dmg. Maximize is the key word. Myself and other Black Mages that are 50 have gone over both rotations and calculated the dps. (5% higher)