its all random, getting first seed doesnt always guaratee you will get the easier group, the best team in challengers finals might not be the best team in masters so if I were a pro I would use this matches to play maps we dont play and practice more than win
example: DRX always getting bad groups and SMB in Masters 3 so its complety useless, also EMEA teams wont be in the same group so doesnt really matter who they get, they should be able to beat any team from ouside EMEA