Heat and bank-roll not considered on this
Once the count is high you want to spread to as many spots as you can in order to raise the ratio of player vs dealer bjs.
I also believe this to be true.
Let's assume for instance the game is 6D, 80% pen, +15TC, two aces extra on average and 4.? decks have already gone to the discard tray. Let's also assume in this situation that there is on average 16 play positions left in the pack to be played before the shoe is over and the pit crew doesn't have a care in the world about us being AP's or how many hands we play. Now let's also assume we will be playing 1 on 1 in any of the following manners to finish out the shoe:
1) play one position with a total of eight hands to the D and eight hands to the player -or-
2) play three positions with a total of four hands to the D and twelve to the player -or-
3) play seven positions with a total of two hands to the D and fourteen to the player.
Which option would mathematically provide the highest EV?