That sounds correct, if you want lightning and meteor. I'm going for them just recieved the last missing frags, but not the 150 ironite from the mystical souls.
Thanks ML, I wasn't sure if I'm supposed to hang onto torrential fragments for any reason. The rewards for that achievement in particular didn't show up for me until this morning and I completed it yesterday.
bob-9503 (playing daily, thank you to all my troopers and clan members in Jomsvikings!)