Play Monti almost every day.  For me it's not about the "best" driver - it's about who gives me a consistent effort with their drives. Especially starting from the 5-hole in.
Since he's taken over the both the training along with his driving duties, Bruce Aldrich has been much more aggressive with his drives. Kyle DiBenedetto gives a solid effort most races.  Greg and Mike Merton are not as consistent as people think - especially on favorites. Jimmy Devaux gives a good effort but forgets the caliber of horses he's racing at Monti. These horses have one move - if you use them too early or hang them out too early - their toast. Tom Merton will give a good effort - from the inside posts, regardless of the odds. Jimmy Taggart is steady.
As with most 1/2 tracks, can't play the 6-7-8 horses, even if their a favorite. And no matter what - stay away from Shane Taggart, Winter Asher- Stalbaum and Adam Moeykins, if you value your money.