Tutorial. How to beat robot boss solo.
At door wait to load (for less laggs), and go to left box in corner.
Now try don't move backwards and to right. wait for Tempest, if it no appear at entrance door shoot Vixen over box.
After kill Gigas jump over box from lifting platform and take down Lime and red explosive balls.
Now time to finish Barbatos.
Good luck!
PS. This way to pass robots is little tricky, you must reach left side before gates open. Often laggs drop you down on stairs and Lime chase you to death...