This guy siege is a joke, you are talking WAY above his head. He has no clue whats going on.His math is sound. as 12 team parley is 4095 to 1. You would need to take 409 shots at it to be 10-1 odds
On 10 teamer 1023 to 1 or 102 shots
These are true odds on coin-flip props...it is different if you start using favorites. If you were truly trying to hit a 10 teamer just to say you hit one, your best shot is to make it open parley & find big favorites you like on a daily basis.