The highest amount of EXP I can get from any heists

When you first start PD2 you will have a penalty depending on the heist type compared to your level.

There is a table on this link which shows different values for heists based on level: http://payday.wikia.com/wiki/Reputation_(Payday_2)

Any XP / cash rewards are only for you. You and your crew will have different modifers such as Infamy bonus, XP repeat heist penalty, XP level penalty, bonus XP from perk deck, etc. Which was one of the reasons I stopped getting Dead Presidents, as it didn't benefit the crew.

You can avoid the XP reduction for repeating heists penalty by not repeating the same missions over and over, spread them out over lots of different missions. Once you get this negative modifier it takes a while to get rid of it. But if you do a Stealh job that can offset some of the lost XP.

Sources: http://payday.wikia.com/wiki/Reputation_(Payday_2)

And nearly 1,000 hours gametime!

From the wiki:

Ace Pilot (Rats Day 3): This asset allows special Ace Pilot Bile to come and pick up the money closer to the bus. This helps players having to struggle their way back to the (Alex) chopper ensure the money quicker.