Community Activity:The Three Doors

You find yourself trapped in a room, but with three exits. A voice tells you that you have 75 hours to escape through any one of the three wooden doors. If you don't, you'll be eaten alive in a gruesome and unspectacular way.

Through each of the doors, is a room that has a silver door at the other end, opposite of where you would enter. The silver door is what leads to the outside.



Unfortunately for you, there is an obstacle awaiting in each exit room.

Objective
Choose the right door to escape the room alive.

Info
You only have several points to go about.
 * 1) No sound can go through a closed door.
 * 2) Behind one door is a poison specialized witch who will poison any living human she sees and kill them.
 * 3) The witch is a spell brewer, but doesn't like fire.
 * 4) If even a single flame appears in her room, the room goes into lockdown, and the silver door becomes sealed shut.
 * 5) She is always making spells, and each spell creation requires her to say a Latin phrase.
 * 6) She has a lot of animal spells, such as animal hypnotising, animal taming, animal mutating, etc.
 * 7) The spells can be thrown at a fair distance.
 * 8) Behind another door, is a fire-breathing dragon covered in scales tough enough to resist a meteor strike.
 * 9) Whenever it hears talking, it will search everywhere it can physically go. Once it sees the talking culprit, the dragon burns it to ashes.
 * 10) If there are more humans that it sees while it's looking for its original victim, the dragon will flame them as well.
 * 11) It also flames anyone who goes into its room.
 * 12) The dragon doesn't go out the silver door to search.
 * 13) The dragon's fire has an insanely long range.
 * 14) In the last door, there is a Saber Toothed tiger who chews up any living thing that goes into its room.
 * 15) It never goes out of its room.
 * 16) It's insanely fast at running.
 * 17) Each door can be left open.
 * 18) The doors open outwards and to the left.

Question
How do you escape?