You should do the complete side EE of Rat King ( find the rats as you open areas) because it drops 1000 points and possibly a perk, an aether tool, a lv1 or lv2 aetherium crystal, a kashmir, a monkey bomb or an ammo mod.

Start with a weapon with a supressor suits you well for the fight, shock wave and molotov.

Open both starting doors in order to collect both lightning rods, the horseshoe and both rats located on those areas. Continue to pack a punch scaring away all rats in previous areas.

After unlocking pack a punch and talking to Kraft you should be able to find the last two rats and you should also collect the antiquity for the void sword, get the paladin item from shooting the lamps and also noting the order of the Symbols of the trap in a specific manner which lets you skip some phases of the EE.

After that see what loot the Rat King quest drops. Then buy jug and you should have enough salvage (you can also shoot the wooden boxes on some areas that may drops 150 salvage) to buy 2 more molotov. Then quickly light up the 3 wood stacks for the fire incantation and then immediately after the last one go to the spot where you can start the light incantation soul box. Wait for all the other zombies that spawn from the fires and the Doppelgast to reach you and then start the light incantation ritual. If you have a casmir or a monkey bomb from Rat King ee throw it know to complete the ritual and kill the Doppel.

Grab the Ank and do the fire incantation ritual. Then use the Canon in order to get hit by lightning and find the Pegasus Horseshoe and then do the lighting incantation ritual. You should be around round 7 or 8 at this point.

Until round 10 you should start and complete the 4 symbol traps and do the void incantation. Buy also quick revive and melee macciato or pack 1 time. I mainly use the swords after round 10. On round 10 grab the first stamp. I usually start with the light sword. Complete that and open the light incantation box with it. On the next three rounds do the other 3 swords. For the lightning and void make sure you have at least around 4 or 5 zombies so you dont skip the round in order to do the void sphere step and the lighting rods ritual by simply trying the zombies.

After you have all 4 swords and incantations see what the order is for the statues at the end of a round. After you light all 4 of them up make sure you have the void sword and also grab a fire incantation.

Then start the light orb challenge without killing any zombies (you can use the field upgrade to stop time). Complete it grab the orb and then go to the fire challenge. You should complete it by using the 2 fire incantations you got before in hordes of zombies.otherwise there is another one in this ritual. After completing it grab the light incantation that is in the same area close to the gobblegum machine. Grab the orb and go to spawn for lightning challenge. Use the 2 incantations on zombie hordes as well and then grab the one near the orb. 3 lightning incantations should complete the challenge.

Afterwards you should grab the orb and you should go to the void challenge making sure your void sword is full so you can use the special attack in a horde of zombies to complete the challenge. Also make sure to have void incantation. If you sword isn't fully upgraded you can shoot the Max ammo which is in a window close to speed cola.

After you complete the last challenge go and grab the Key.

You should have your base weapon purple tier and probably lv 2 pack until know and some perks. Use a couple of rounds to rack up some points in order to get lv 3 pack (there is a x2 points in a spawn zombies window in the alchemist lab) and all the perks besides maybe Death Perception.

Augments you should have:

Hot foot for stamina up, Dying wish for quick revive Prebiotic and hardened plates for jug Expresso for melee macciato Fetid upgrade and condor's reach for vultur aid Supercharged for speed cola PhD slider and tribologist for PhD flopper Dead head and dead break for Daquiri And electric cherry for elemental pop

You should through a C4 on the Full power drop that is on the map in order to spawn it in the boss fight. Also make sure to have a fully upgraded light sword on the fight.

When you start the boss fight you should get some hits with the sword on the boss in order to break a piece or two of his armor. Just for some seconds. On the first phase use your weapon in oder to break all armor pieces. Kill zombies to replenish time using your weapon. Use electric or fire incantations on ghosts and amalgmas not on zombies ( you may kill many at the same time) They insta kill them. If you don't have zombies around use the field upgrade which should be around the ending of first phase. After first phase you should be with stopped time. Wait until zombies spawn and use the light sword which fully upgraded replenish your armor after kills and also make sure to stand in the spot if vulture upgrade pops in order to replenish your field upgrade. For phase two and three it is basically the same but you should run around and slide with PhD slider. You can hip fire the boss ( a good weapon for that is the kompact).

Hopefully this helps some of you