Feasability of creating a very large spaceship with AI navigation

I’m building a game which is based on a warcraft 3 map and so I have some questions on the feasibility of getting AI to work.

Basically, there will be a large spaceship of 6 levels. I want to build a vent system to go level-to-level and I’d like the player to walk into an area and then be teleported to the vent, then they can walk to another exit in the vent system to go to another level.

Now, I will have AI on this map and they should be able to go through the vent as well. Is this going to be a problem? Should I build the vent system as it would literally exist in real life to get the navigation correct, or can I build this teleport system that takes you to another level and get this to work properly with AI so that when there are no attackable object on a level they will begin to navigate to the vents.

Thanks in advance.

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