A good style can never have too many symbols.

• Symbol varity is always good. Just variants of some of the same symbols would be great, like variant bridges and castles and towers and more
• Different races and cultures, as you mention elves, dwarves, halflings, orcs, but also culture-inspired like middle-eastern, far eastern, jungle tribes, aztec/maya inspired, bad/evil lands
• How about a mountain symbol with a dragon on top of it, and a volcano and a mountain with a mysterious cave
• Ships and sea monsters
• Windmills
• fruit trees
• a black cat pushing things off the edge of the map
• icebergs
• all kinds of ruins, cities, castles, towers, etc
• a snow and ice fill.

By default, templates only contain references to the fills used for the style (You REALLY don't want to have them all listed, trust me :)), so that means that drawing tools not made for the current map style will show up using the currently selected fill (see your status bar), instead of the actual fill used by that tool in it's native environment. (Your current map seems to be the Ancient Tombs style)

There's more information in this FAQ topic, including how to import the fills to the current template:

Not for lines. Polygons gets a hollow middle whenever the line width is greater than 0, but lines will be solid all the way, unless you use the "hollow" fill style (You're not, since your rivers are using a bitmap fill) OR you have an Edge, fade inner effect on the rivers, where the inner opacity is set to be lower than the outer one.

Looking at your drawing, you do have an edge fade inner which is way wider than your rivers which is also the partial cause of your rivers being very difficult to see. I didn't notice that immediately when I looked at the map earlier because I worked with effects off to see it without the glow. You can try changing the width of this effect to something like 0.2 and see if that works for you.

Is this for any entity in the map, or is there a specific entity that crashes each time?

Can you share the .fcw with us?

These maps are now in the atlas. Thanks @Ricko Hasche for another excellent contribution.

Note that the Adill, Reefs and Uldir was wrongly scaled, they were about twice as large as the corresponding area on the parent map, so I re-scaled them and edited the scale bars.