I'm having an issue with Pyroblast. When Pyroblast is used, then refreshed by Presence of the Mind, the icon is reset to being off CD, but Pyroblast won't cast for the remainder of the actual cooldown.
If you jump, then press sleep, you are suspended to when you jumped. This is a stack-able bonus. If you jumpsleep to roughly the height of your level 3 tower, nothing can attack you.