This ghostly vase mode print ends up surprisingly rigid and robust as far as these things go! Presumably, that's because all that detail ends up adding plenty of extra material, and because all those indentations and protrusions effectively brace the form against movement in pretty much every direction :)
As usual with complex vase mode prints all the work was in identifying all the tiny bits of geometry that don't strictly meet the requirements for that kind of printing. The biggest culprit remains junctions between planes that form valleys with horizontal creases, and which will end up as an unsupported extrusion into the void.
Some of those kinds of issues just aren't obvious until the model is in the slicer and you're stepping through it to verify that each layer is properly supported by the one below it. It tends to be very apparent there - a line suddenly springing into life out of nowhere tends to stand out :)

Print Description
This is a vase mode print, so set your slicer accordingly!
I printed at 0.6mm line width and had great results!
Print Dimensions
The Phantom Cavalcade Vase occupies 150mm x 150mm on the print bed and is 185mm tall.
Supports Needed?
Not at all! Designed for straightforward printing!
Scalability
This will scale nicely up or down thanks to the wonders of vase mode :)
Print Orientation
As you would expect for a vase mode print, the Phantom Cavalcade Vase prints right-way-up.

File Location
You'll find this one at at 462 Phantom Cavalcade Vase
Link to dropbox post: https://www.patreon.com/posts/31697592
Further Thoughts
I originally intended this design to have ghosts swooping between windows! It was technically doable, but just looked weird and awkward, so have more firmly anchored ghosts instead.
Happy spooky printing!
xoxo
Sven.