The choice of concept

Mountain town
Pro's

• Already started ready for alteration
• Comfort zone of work
• New fresh concept
• Interesting racial creation
• Lots of reference material

Cons's

• Unoriginal
• Ridged
• Large scale

Lich Phylactery

Pro's

• More interesting
• Shows more depth of development and design
• wider range of skill set
• very fresh and can implement a lot of creative ideas
• Creation of why this area exists (lore creation)

Con's

• No template to start
• Little amount of reference material
• Steeper learning curve (unfamiliar territory)

I am more leaning towards the lich phylactery for my studio work. I think the concept has more potential, than the mountain town. It would be a better asset to show off my skill and has a much better chance of improving my own skills.