I hope this is in the right place. Here are a few tricks I’ve tried against the new upgrades. Spoilers?
Hunters - cover & concealment isn’t effective against the 50 cal hunters, but he flashes a red light before he fires. It’s easier to see this at night. Shift right, pause for 1 sec…then shift right again. Use the time to take out his friends. Leave 1 of the pack up, but weaponless or harv will call for more.
Bug? If you only enguage w/ 1 hunter at a time, for whatever reason the others will only chase you. The spawns don’t have this bug.
Harvs - since they are showing up in pairs in many locations, use the safety about enemies approach. Put yourself in between them, if possible. Their rocket barrage will hit each other. Watch out for their insta gas attack. There’s no delay in getting hit by the gas.
Dogs - Circle of death (cod) is useless now. The upgrades can insta lock and fire. When approaching dogs run towards them, then cod your right, their left. There’s about 0.5 seconds as it fires on your last position. I noticed that the AI tries to decide if it should rotate weapon, turn to face you or jump attack. Use that time to pop the gas tank.
Tank take down - I call this ‘the crazy Ivan’. Pop the tank w/ an EMP rocket. Rush up to the tank on the rear. Shoot off the tick pop, then rush back to cover & reload. Then EMP it again, but this time approach the left or right leg. Target the weapons from the side. Bullets that miss the missile or weapon pod will hit the one on the other side. 2 or 3 passes will disarm the tank. When tank does his bull charge, put a building in between you and it. It gets stuck in the building 50% of the time. Peck away with a hand gun to conserve ammo. Watch out for seekers that travel with them.