DUST II:
Dust 2 is considered to be an aim map, considering its wide popularity and its frequency in showing up in map pools has driven teams to practice at lesser times than other maps. This being said, many teams' wins on this map come down to raw talent.

NaVi:
NaVi are now considered the number one team in the world as of right now, due to Fnatic's lack of performance with the absence of the best player of the world, Olofmeister. NaVi have been looking great the past couple of months, boasting a tremendous amount of wins over tier 1 teams in the past month, supporting the reason as to why they are the best team right now. NaVi have Guardian, debated as the best AWPer in the world, and if he shows up, then Dust 2 will be taken by NaVi. Considering their number 1 placement in the world and their recent results at international majors, they are definitely in top form. They even chose Dust II as a map in one of their recent major finals. But there is no reason to deny mousesports of a win.

mousesports:
mousesports are the 9th best team in the world. Exceptional players such as chrisJ, nex, and niko drive the team to success. Recently, we can see their 16-13 win over Liquid and an impressive 16-5 win over Astralis, who are rank 4 in the world. mousesports will be putting rounds on the board all game, but to some extent, will not be able to defeat the defending no.1 team in the world. If the favors are on their side, there is a strong chance they will upset.

Low - NaVi

My bet: $2 NaVi