how tight is the speedrun marathon achievement?

[sonder]

is it possible to complete it with an average of 3-skill-lamp completion times, assuming 0 to minimal deaths? im almost finished getting top half of the leaderboard on every level, contemplating 100%'ing x_X
Do i basically have to get 4 skill lamps on every level back-to back almost :x? cause that would kill it for me.

EDIT: wooosh come to think of it idk how people reliably do "100 - Sorry" without dying a bajillion times. i may have underestimated it because ive spent hours just trying to complete it let alone get on the leaderboard.

[sonder]

bump because i replied to a bunch of other posts and buried my own xD.

[BebRav3]

yo, it is very tight. 100 levels,15 minutes is 9 seconds per level...