I don't know how helpful this will be to you, but a couple of tips nonetheless.
The structure of the base:
Three hangars at the top.
A corridor in the form of an elevator at the far left or right wall, a corridor in the form of a warehouse (during the battle, the warehouse has a good arrangement of doors) and then the rest of the base. During an attack on the base, enemies will spawn in the hangars and the elevator. You get a corridor of death, which is convenient to defend.
Do not be afraid to sell plasma weapons, they will not be available to you for a long time, and the money is good.
Top weapons in my opinion:
glock18 (starter weapon with high DPM)->mp5 (great transition weapon)->BlackOps SMG (snap x3 imba)
stayer aug/g36 (good accuracy, snap 20 cells, ignore armor)
BlackOps Rifle (good weapon for beginners, snap 20 cells, ignore armor)
BlackOps Smart Rifle (good weapon for beginners, better accuracy, but snap 18 cells, ignoring armor)
FN Fal (snap 16 cells, bonus damage + ignoring armor, imba in the hands of experienced soldiers)
Arasaka3000 (accuracy!!! snap 24!!! cells, bonus damage + ignoring armor, IMBA)
Asuka4000 (accuracy!!! snap 26!!! cells, bonus damage + ignoring armor, IMBA)
Arasaka3000 and Asuka4000 are some of the best rifles out there. Beginners will almost always hit with good damage, veterans will destroy tanks...
BlackOps Auto-Sniper Rifle (snap 33!!! cells, bonus damage + armor ignore, IMBA). Another IMBA gun. In the hands of veterans can make a bloodbath.
MG3 (great damage especially for the stage it appears, snap x2 32 cells, auto x6 32 cells... Shoot only from a crouch because the accuracy of +160%, IMBA, hits very far, the probability of hitting is very high, the DMP is excellent)
Any Pulse Weapons with chemical ammo. A really fucked up weapon, seriously fucked up. Especially M.A.G.M.A. Pulse LMG (Catastrophic damage, bonus damage, snap 25 cells. Kills almost everything with the first salvo. Stupid IMBA). The enemy has a lot of armor and even has resistance to chemistry? I don't give a shit, after the first shot the armor will disappear, and after the second shot the enemy will disappear...
XM29 only as a grenade launcher. Direct fire and six rounds in a clip. I can't stand other grenade launchers with their hinged trajectory, they are all very slow and heavy, constantly needing to be reloaded. This thing fires direct fire several times with excellent accuracy and damage. Was an imba before the nerf, but still a great weapon.
Try to go straight into promotion 2 and personal protection. They open up armor vests that are very good defense against the kinetics of cultists. For this you need to research a living mutant (MONGORN, SPIKEBOAR, FENRIR, etc.), psiŃlone (squeeze from exalt) and "get to know" the cultists . This happens very quickly. In the area of half a year. And you don't have to go in hand-to-hand to stun a mutant, it's enough to shoot him and sit in a safe place. He will go down on his own because of his injuries.
PS. I tried to go out in a good armor. I guess I lied about six months. Personally, I got it, but for a player who is just getting acquainted with the mod, it will be difficult to so rush. Well, within 1 year or 1.5 years of measured play is fine. The main thing to emphasize on the important research and in the first place to open a biolaboratory and intelligence center.