Could have made up a few seconds with better positioning, but any freezing/stuttering would likely negate the gains (each successive attempt seems to get worse with this, even after downgrading recording quality with OBS). Interesting game to run since the bosses are the only real choke-points for better times.
Improved time by 31 seconds using EX attacks on Chapter 2 boss at start of fight and during missile barrage when boss is off-screen and otherwise unhurtable, focusing attacks on Esto in Chapter 3 every time she appears to lower boss health before fight technically begins, using the green portal in Chapter 4 to break boss armor faster, and using successive EX attacks in Chapter 6 to avoid boss attacks that otherwise stagger and slow damage rate.