Donut is a crucial map for both teams in my opinion. AM always banned it and it's also not Tyrant's best map (losing twice to Finland). I don't expect Tyrant to be dominant on open maps like Dust and Arabia, so they have to play the unusual maps on another level if they want to win.I go for tyrant 4:3. The maps with more decision making (donut/beachfight) should favour them. Quite important will be who's gonna be the pocket for tyrants (ideally Viper) and for aM (ideally Heartt). If Heartt use teal aM wins, if he's other colour Tyrant wins.
Sling's influence can be crucial and I don't remember aM ever slinging during the tournament. Maybe that will change now.