The 25 way 8, marked with 20 numbers grouped 3-3-3-3-2-2-2-2 has long been one of my favorite tickets. At a dime per way, it costs $2.50 per game to play, and a 40 cent per way wager gives you a good $10 tournament ticket. It also has a 25 way 12 that is worth consideration.
The fewest numbers that you can play and still have a 25 way 8 is 11, if they are grouped 2-2-2-1-1-1-1-1. This ticket is almost a king ticket, and shares some of it's strengths and weaknesses; pay outs tend to be higher but less frequent.
A more attractive option, at least for me, is to take 18 numbers and group them 4-4-3-3-1-1-1-1. This ticket offers both a 25 way 8 and a 25 way 10 for those who would like to play either or both. Since it has seven more numbers than the eleven spot mentioned above, it will hit on the average nearly two more spots per game. This accounts for the higher frequency of winners.
If you take 19 numbers and group them 4-4-3-3-2-1-1-1 you get the interesting configuration of a 25 way 11, 25 way 10, 25 way 9 and 25 way 8. In a tournament setting, you could play all these ways for a dime per way and get a $10 ticket. Or you can mix and match! If you play all 100 combinations and you hit an 8 or 9 out of 19, you should do rather well.
Here's what it looks like at 20 cents per way:
Well that's it for this week. Good luck! I'll see you in line.