Shadow Raid Deathwish is by far the fastest xp per minute you will get. Requires atleast three people with 2 ecm jammers but preferred 4 players. Each person of the team will be responsible for finding bags of loot spread out over the level. One person covers the outside red containers which can contain money bags. Two people secure a key to open the vault containing the shadow armor and one person locates the crowbar in the kitchen on the first floor and opens all the crates. Be sure to buy the extra loot drop off during preplanning. We place ours right outside the warehouse. I have linked a video down below showing a run my team did. Not the cleanest run but you can see the amount of xp and money we obtain in a short time frame. Each person needs to cordinate when they place there jammers down. In the video below I forgot at the 2 minute mark to place my jammer and an alarm triggered. You still have one minute once the alarm goes off to finish though.