Mirage Mid Flash from CT Spawn
TechniqueJumpthrow + W
Early flash to support players peeking window or connector if you're going towards B.
Position yourself against the wall roughly in the middle of the door. Aim horizontally between the texture seam and boards, vertically just below the scaffolding. Positioning is somewhat forgiving.
Jumpthrow+forward bind yields best results but regular jumpthrow works too. Works on both tickrates.