thanks to the agdq video and veman3000(very nice besides not hitting the last orange ghost in Wardrobe![3-4 second gain]), I was able to speed up Anteroom.
Picture is right after the first pair of ghosts in wardrobe room.
http://i.imgur.com/DccbUmU.jpg
Left side is faster speed. Right side is older version
Before I was assuming that getting close to the door on the last pair would help me get through the door faster and get the ghosts closer. But just getting the ghosts closer faster makes it faster to capture then run for the door (extra bonus if you can walk towards the door while vacuuming).
One thing that's not the same if you guys watch the twitch streams is that with everyone doing Hidden Mansion, it is way easier to suck up ghosts and move at the same time. Regular mode it is very hard to try to move around with ghosts because if you hold down directional keys, there is a chance you stop taking their hp away for a frame or more.