After start finish you need to align the car for the left corner out of sewer. If you are desperate you can use Micro DS Drift before the corner to be more on the right.
Use a Micro DS Drift for the left hander out of sewer. Hitting the wall here is not a lot slower, but if you want a good lap not hitting the wall will be optimal.
After junkyard drive left around construction side
The rest can be done without using DS, just try to drive tight lines through all corners.
Reverse
On reverse the first part is driven without DS
At construction side use the shortcut in the middle. Sometimes a small Micro DS Drift helps to get the corner into the shortcut.
When jumping down Jump Tech can be used to keep higher speed when landing.
Use Tap DS to get into sewer without hitting the wall.