View on Official Skill Tree Calculator Starting Skill Phasewalk Gain the ability to turn invisible and move incredibly fast. Upon entering/leaving Phasewalk, you create a Phase Blast that damages nearby enemies. You can Melee attack to end Phasewalk early. Cooldown: 36 seconds					Lilith Purge
Tier	Controller Tree		Elemental Tree		Assassin Tree
1	5/5	0	5/5	1/5	5/5	0
2	5/5	0	4/5	0	5/5	0
3	0	2/5	0	5/5	0	3/5
4	0		5/5		0
Totals	12		20		13
	Required Level: 50

 Class mod: Firefly (For extra ignite dmg, Spark, Diva & Phoenix)
    
    Weapons:
    
     
    
    *Maliwan Hellfire SMG
    *Scoped revolver with high accuracy and dmg without elemental effect for scoring brains (could be a non elemental sniper also)
    *SMG with explosive elemental, for fire resistant enemies (Pumpkinhead)
    *Anything other than a SMG, for when SMG ammo runs out. Preferrably incendiary. 
    
    
    
    Artifact: Incendiary
    
    Shield: High capacity, corrosive protection, never mind regen time (phasewalk away if things get hairy)
    
    Grenade: Transfusion
    
    Pros:
    
     
    
    *Hellfire with Quicksilver, Slayer and incendiary boost is awesome. One quick burst to the head kills most, if you miss the critical hit the zombie will still burn away in seconds.
    *Zombies that get too close burn from Phoenix. If that doesn't help, phasewalk away and watch them burn from the blast.
    *Speed from Intuition. Zombies are normally much slower than you, now they are no match at all. 
    
    
    Cons:
    
     
    
    *Eats up a lot of SMG ammo. Harvest and buy ammo whenever you can.
    *Harder to harvest brains, zombies somtimes burn away before you get the critical hit kill. Use a non elemental weapon from distance.
    *Phoenix will set off barrels if you get too close, damaging you. Try to shoot the barrels beforehand or tread carefully. 
    *Sometimes your view of the horde is obscured by fire explosions, making it hard to get critical hits.  
    
    
    Comment: I only put one point in Spark, to activate the class mod boost. Since the Hellfire is the main weapon and it has 100% elemental chance Spark is only needed for secondary weapons. Since zombies come in hordes, all "on kill" skills have some points allocated, they will be active practically all the time.
  
  
    Comment 2: After reading this[1] and this [2] i'm thinking of reassigning more points to Spark, since it seems to affect the Hellfire anyway. And also changing the secondary SMG to something else, a repeater perhaps.