A Map, a String, a Light is one of the most beautiful acoustic math rock songs I've heard.
A Map, a String, a Light - 9.6/10
The Tide - 10/10
Mermaid - 8.3/10
Of Age - 7.9/10
Hauntsly Pinkerdinkle - 8.2/10
EDIT: Mermaid and Hauntsly have grown on me bumping the rating from a 91 to a 94