S ranking standard gives you the infinite samurai edge. Which you can't use if you're trying to get the minigun or rocket launcher
I did it Claire A, because her scenario is shorter and easier then leons.
S-ranking standard ain't too bad. I did a shyt load of back tracking/running around and had 3 minutes left. shyt so much back tracking. Hell I could have cut an hour outta that run now
But really s ranking standard is so damn forgiving
1. Plan out your routes and items you're gonna be carrying. So you can minimize backtracking.
2. If you know it's an area you're coming back to then kill the zombies/enemies there. If not, try to stun+run pass them.
3. Move the far left bookshelf over. That way you don't have to waste too much time once Mr. X is trigger on your return.
RPD is what's gonna eat up most of your time..