If you think that dignitas choke, you should not pick f0rest, because the +5 points from the role will be nothing compared to the like -20 you get for the bad rating. You fantasy will be ruined either way. If you think f0rest is going to do well, it is stupid to give him the noob role because you will be throwing away points.
That's why you should never use the noob role. The goal in fantasy is to go into the top 3, no one who ever used the noob role did this because there would be others instead who have the same team but not the noob role