Few things...
First, please take the zone name out of the file. Your name in the corner is OK, but if SOE reuses the zone we can reuse the map as well so zones don't get their name hardcoded into the image.
Next... you need a height min/max if and only if it's split into multiple maps. This one doesn't really need to be split up, although some shading on the overlap area (to let folks know it's 'above') may be nice., maybe some lines on the stairs to make them look more like stairs.
Another option would be to split it into two maps, one for the bottom and one for the top, above the spiral staircase. But that is probably more work than it's really worth. You would only need height min and max if it was split this way, in which case you'd probably split it about halfway up the spiral staircase.
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