In the beginning of the heist you will be killing all the murkys and hacking the security boxes
after that you will face to face with the Quick Responder units (On Death Sentences you got 4 second time window before they coming in)

These are the good spots for taking cover but one of these spots you need to watch your back and your sides cause you still open on that side of the area but at least your front is already covered

Now after you open the gate to the main area
There will be cloakers waiting for you these are the common spots he will waiting for one of you to be cloaked

Now this is where the juicy part coming in
Now the only available cover is right at the mainframe area



There is also some of good cover but you will use it temporarily to revive fallen comrades and pick up some ammo


Sniper Position


Snipers is going to spawn in this area these are the snipers spot where they always spawned in



Crowbar location


Now you also need to get the crowbar is located at this area

Well this lab section is only have one good area to use as a cover

These are the location of the Batteries you will need for the laser gun

Computer labs is a bit tricky cause of the spawn is at any direction and you have to move to these covers

The only cover in Archive Room is near the gate where you will be getting the box

Symbols

After you drill the gate you will need to enter the right symbols on each pile of documents that is on every table (NOTE: Locke will not tell you what symbols to enter so you have to figure it out yourself)
Its like the color number code on Golden Grin but its more complicated


Screenshots taken from Connor Shaw videos

Now the only cover in this area is near the gate to the box

Screenshot taken from Connor Shaw videos

You will find the whiteboard that you need for the key item you will make
Write the compund that is on the whiteboard and the one compound that is not on the whiteboard is the first compound you need to put it in

You will find some locked cupboards you need to open now you need to ask from your teammates to cover you

Now when you retrieve all the boxes Locke will advise you to return to the spawn area but the cops will be waiting for you and also some surprise

The only cover is one of the ambush cloaker spots now the cops only coming from the spawn so no cops coming from the warehouse

Now you already deal with the cops where you spawn now you have to hack the security boxes to turn off the turrets (You can destroy the turrets for skipping the hack parts but it will cost a lot of ammo)
The only cover that you can use is when you going to the security boxes on each sides

PERK DECKS

The Perk Decks that is quite useful for this are the following:

-Rogue
-Stoic
-Grinder
-Kingpin
-Sicario

Now you might gonna ask
Wait why Sicario is useful

Sicario on this heist had a purpose to make a temporary cover from the cops fire
if you feel in a pinch to go back to your teammate and your other teammate have Sicario ask them to throw the smoke grenade at the position that you going to or throw them at the cops

Stoic users can be a temporary tank to clear the hordes but they will be vunerable against Dozers
either they use a Solo Stoic build or Support Stoic Build

WEAPONS

I know this is going to confuse you guys but the most useful weapon in this heist its going to be the Akimbos SMG or Stryker18C

Crits are useful in this heist to clear all those cops

You might wanna bring launchers to kill hordes more faster

Sniper Rifles can be useful to take out snipers that will be waiting for you and that nasty Graze Skills :3


I hope this guides is useful for you guys and good luck fellow heisters

Ancient Original Crew masks:

Remember the pattern on the Boxes from:
-Golden Grin Casino
-Breaking Feds
-The first box you will get on Henry Rocks

Insert it on the right order on the archeology room where you will get the box and you will see the ancient masks

ERECTING A SENTRY