In case you don't have a fast connection to download the large AVI, here is a short vid showing only the one round Phantoon kill scene of the same run by JXQ:
Moozooh: If you have enough Missiles to shot it's best to use them even for clearing Phantoons flames before starting the wave for the one round kill because Missiles have the fastest cooldown of all with 10 frames. 2nd fastest is the normal Beam (no matter which one) with 15 frames.
Wow, never seen that before. Amazing.
And as for what you said about the Missles having the fastest "Cooldown Time" I am guessing thats the interval of time in which you have to wait to shoot another one?