I kill the 3 lickers instead of taking the 2 (or most likely) 3 hits from them combined from the 2 times I pass them. This allows me to avoid picking up the First Aid Spray at the end of part 4 in the cabinet and most likely use it after the lickers hurt me. This way seems faster and certainly more consistent especially at such a late stage of the run. The MO disc room can be a disaster also. Those zombies in there don't always cooperate with me when I grab the disc. It's one of the most important (must go well) areas of the run. Also being right at the end does not help at all. Luckily it worked out.