Hello speed reader is the only achievement left in the game I don’t have if anybody would be interested in helping add theEtrain75 also if you could leave a message so I know your from the forums 
This achievement is actually a lot easier to obtain than it sounds. I pulled it off solo within an hour of my attempt. The key is to rush past as many fights as possible. Most of them are entirely avoidable, aside from the airlock sequences and when whittling down the opposition during the end.
Another tip is to activate the Bandana skull if it pleases you. It won’t interfere with your achievements. Allowing you to spam grenades, shotgun blasts and even rocket fire if you need to blast past a horde of Flood. This will save you massive amounts of time.
I would gladly assist you in-game, but my mic is busted and it would be tough for me to properly guide you on getting the job done.
I followed this guy’s guide and got it pretty simply:
Thanks for the suggestions guys