After using Arcane Fire a bit, I've noticed it has an obvious delay. Almost like when you'd shoot some magic missiles. For the way this spell works, that you have to click conversion and so on, I feel time is already lost on that and with the delay pretty noticeable... Was going to see if it could be shortened to be well, less of a delay? I think Polar Ray is quicker from Cast -> Damage and Disintegrate certainly is (both are rays).