Astralis is going to win it imo, NaVi could make it to the finals if Vitality underperforms but I doubt they will as they've looked very consistent throughout the tournament and probably want another rematch with Astralis after getting stomped on Inferno yesterday.
In the consolidation final I am giving advantage to Vitality for the same reasons, Zywoo gets more help from his team than Simple and that should probably be enough to see them book another match against Astralis.
The truth is that the level is getting more and more equal and bookmakers have access to such statistics with machine learning that you will never win anyway. Of course I speak ironically, but the times of good odds without insiders begin to dwindle