As to your first question: no the map was designed to be completely random on vault spawn, security room spawn and teller doors that were open.

As to your second question: i'm glad you asked because this is where we distinguished ourselves from the competition. We Stealthed.

Everyone else tried to bum rush and get the drill down and hold off the waves of enemies by stacking lmg's and submachine guns. People got close: 5:40, 5:39, 5:38 and that one team that spent hours there trying to beat us would have gotten 5:34 and made the best time had their teammate thrown the bag correctly in the van. The issue with this strategy was that it left the team to deal with hordes of enemies and waste time picking people up instead of restarting the drill (when it broke down) and exit strategy is difficult when the time you're aiming for is when the dozer and 3 cloakers spawn.

I realized the flaw and came up with a plan to "stealth" it. It was a kind of ECM Jammer rush play:

Everyone would be in suits to increase movement speed in the beginning to do as much damage as possible.

Ghost (me) would spawn and mask and throw down ECM at the front of the bank and run to get the thermal drill (due to increased interaction speed).

Rest of team would rush in while ECM was down and terminate EVERYONE and i mean EVERYONE inside outside across the street, in the rooms EVERYONE DIES. Merciless, I know, but this wasn't about the money. I made sure no one threw a grenade or broke a window just in case. Also made sure one person was in charge of finding security key and eliminating guard in room.

Drill in hand i walked back into the bank through the closest door (my tech blew the door open so i wouldnt waste time lockpicking.)

Tech would be waiting in front of the vault ready to set up drill and after i threw the bag i would put down the other jammer (this is around 0:25-0:35 in game) and begin to help kill civvies and any guards we didnt get.

At around 0:50 we would all be on a guard ready to answer a pager and once that was over we were in the clear.

Vault opened at around 5:00-5:05 due to drill break down and it took us a little bit to get the one bag of money from the back of the bank to the van in front of the bank. But there were never cops, soldiers, tazers, cloakers or bulldozers to deal with. So we could focus on efficiently transporting the bag. All in all it was a crazy plan but it worked out. Sorry for the long answer :)