Big red, i often like to use the \'win and be there\' theory. If i was attacking trifectas with a small bankroll in a large field like the Derby, i\'d pick out a horse i liked, lets say i liked Animal Kingdom and thought that the other horse i liked was Nehro (all hypothetical of course). I would box AK and Nehro in the exacta, than i would take AK and Nehro, over a packet of contenders, over AK and Nehro....just to avoid getting \'split\' with my exactas running first and 3rd. If i get split, i have a few shots to hit the Tri.
If i was recommending a wager structure for a small bankroll in the Derby, i would say the first thing you need to do is to pick out the 2 horses you like the best. Than, pick out the 5 or 6 horses you\'re scared of. Lets say your two best picks are the 1 and 2 and the 5 horses you\'re worried about are the 3, 4, 5, 6 and 7. You can make an exa partwheel 1,2 with 1,2,3,4,5,6,7. That costs 12 bucks and then you can go 1,2,3,4,5,6,7 with 1,2 and that also costs 12 bucks. I\'d get a 5 dollar exacta box 1-2 incase your two best picks actually finish first and 2nd. This bet will cost about 30 bucks and you have a great chance to make money if one of your top picks finish first or 2nd. You get a lot of coverage for a small amount and you still have a shot to hit your top 2 choices for a 7 dollar exacta if your handicapping is amazing and you run 1-2.
This is just one of the ways i like to structure bets.