Occ. quickens spellcasting can be both a blessing and curse depending on this situation, I personally rage whenever my sch af3+2 procs and I don't kill a mob because I resisted because it instacasted it in my pre-cast gear -_-
What wolf said only w/ songs and lack of song type+ gear and minus the killing part. I wish there was a way to fix this w/ how spellcast works that does not include idealing in the midcast set of my next song.