A consistent setup is to align with the wall below the door frame facing right. Jump and turn around to land on the door frame. Then jump and turn around again to return to being aligned with the wall but at the right height for shooting the Super. This strat involves shooting a Super diagonally from the correct height while flush against the left wall. Its acceleration will cause it to clip into the blue gate off-screen.

Requires:

{
  "notable": "Reverse Gate Glitch"
}
{
  "obstaclesCleared": [
    "A"
  ]
}
{
  "obstaclesNotCleared": [
    "C"
  ]
}
{
  "doorUnlockedAtNode": 1
}
"canTrickyJump"
"canOffScreenSuperShot"

Clears obstacles: B

Unlocks doors:

{"types":["ammo"],"requires":[]}

Dev note: The reverse gate glitch pretty much requires killing the enemies first, so it's required here. Direct GMode would have a usable door frame, but the gate can't be opened.