Class: Assaulter for the perk that regens HP upon killing enemies.
Elite enemies location:
Juggernaut and shield bearer: paid extraction building.
Shield bearer x2: one outside Hotel and another one will either spawn
Kurohana ninja: nearby the two story building with the zipline which in turn is close to the stairs that lead to Observatory.
Do 2 or 3 contracts wherever your spawn ASAP and then enter radiation zone to start completing tasks, they don't have to be done in order (so, for example, you can start the time one before you even kill the first elite enemy). Use common sense and the Assaulter perk so your HP is always as high as possible and use your cash to restock on armor plates as needed. Regarding the perk itself, I finally see it working like it should (restoring HP fully) unlike the partial but still life-saving and game-clutching ones from Season 0.
Buy a vehicle just in case, it can save you.
Remember! Your armor HP cannot exceed 50 when exfilling in the final flight otherwise you'll fail (yes, thats why I hurt myself with the grenade right at the end to have another chance to plate up again just so I wouldn't go over 50). Yes, I have the explosive damage reduction from Assaulter class and it is exactly at -40% damage. If it works the way I think it does in MP, it should reduce the lethal radius/max damage radius of the grenade by 40% (Ann-online, if you are reading this, please correct me of I'm wrong)
Anyway, how the heck do I complete the mission wherein I can't be spotted by enemies? Spamming smoke like there is now tomorrow?