You can turn Jack off on madhouse. Buy the crow key for 3 coins, go in the basement and trigger his cutscene down there. Then he'll stay there waiting for you. Ofcourse making it there is not all that easy.

ohhhh didnt know that!

Too bad I can´t even kill Mia =(

Jack is a distant dream to me in Madhouse...

Be positive!You can do it!

Its actually not that hard.Just remember to always keep your distance.And if by any chance she gets close, block her atack and then run.Repeat at infinitum until you beat her!

I will try! But I you try to beat the game on easy in 4 hours first, so I can get the circular saw =D

Dunno if the circular saw will do you any good against Mia. Easiest tactic is to run back and forth through the hallway. She'll come the other way around. Hold steady, pop of one or two headshots before she gets close and run around to the other side again, repeat. Do not miss more than a few shots and collect all the ammo first naturally. You don't want to run out as any direct confrontation is very likely to end badly.

I will try, but that crazy bitch sure runs fast. 

You need to be gone before she starts running. Get her when she's doing her slow walk. Trigger the start, immediately run to the far hallway (near bed) close the door and take position at the end. She breaks the door, shoot, go into the dead end. She'll break the wall creating a loop you'll be using. Shoot her, run back into the first hallway, wait until she appears around the corner, shoot, run to the next position. If you get the rhythm right she'll always be slow walk following you around or back and forth. Use sound to make sure which direction she's heading at the other side of the wall. It takes a lot of steady nerves.

On my second madhouse run I actually had more trouble with the very first Mia encounter. Dunno what I was doing wrong yet she killed me over and over in the very first room she throws you in.