>>535942470
Each stat is equally likely and getting 600-1100 points in either stamina or speed means a 10% to get at least a 2* on either stat or one for every ten runs. Exclusively aiming for 3* on a single stat is 1% (assuming 5% for 3*) meaning exactly 1 in a hundred runs on average. If you can always get 1100+ in that stat (doubtful) your odds double to 2% meaning half as many runs. Of course, Including two other stats (i.e. speed, stamina, power) to your list of desirable outcomes triples these odds to 3% and 6% respectively.