The advantage in parlays is that you increase your ROI over straight bets when you can consistently pick winners (conversely if you are a losing player, parlays make your ROI more negative, so be careful).
RR parlays maximize the advantage you have using parlays, at the expense of a large increase in variance.
parlays generally give slightly less than the correct odds for taking the winnings from one and applying the sum to the next bet (not true in all cases, many books give full odds on 2-team parlays), so action-reverses which actually give the full odds should have a higher return, also the action-reverses allow you to get down twice as much money as a round-robin if you're running into betting limits, which seems to be the primary reason to use round-robins in the first place (assuming the limit is on base wager amount, rather than maximum possible loss, not really sure what most books go by)
RR parlays maximize the advantage you have using parlays, at the expense of a large increase in variance.
parlays generally give slightly less than the correct odds for taking the winnings from one and applying the sum to the next bet (not true in all cases, many books give full odds on 2-team parlays), so action-reverses which actually give the full odds should have a higher return, also the action-reverses allow you to get down twice as much money as a round-robin if you're running into betting limits, which seems to be the primary reason to use round-robins in the first place (assuming the limit is on base wager amount, rather than maximum possible loss, not really sure what most books go by)
That is true. If you've got a -EV then it doesn't really matter what you bet, if you play long enough you will go broke. No two ways around it, only variables in how quick it happens is how much you bet, how big your roll is, how often you play and so on. One of the problems with parlays even for winning players is you can't shop for #'s. Sometimes if you have a lot of outs you can find it difficult to find all the best numbers at the same place.
