fanduel drops the lowest score. if you already know that going in, you should select the highest team of 8 and select a 9th player that is minimally priced just to fill out the roster
that 9th player is not going to matter, so selecting the cheapest option is the best route. the other 8 will "carry" the team and ultimately score relatively higher
* Might work out better to choose the drop player 1st and just find the very lowest salaried player there is and lock him in.