thats just about right, 4 is a little hefty i think, and hes definatley not clearing it, what weapons does he have, Doom or Halo? if he has Doom ones then he is likely to take 4 and go onto the rest and die at the end or 6/8
hmm i think 4 will be tough but hell do it, luckily he gets reload after otherwise hed be toast, Sabboth, hmm, i think this is where he is going to find dififculty ya see Sabboth has a BFG cannon, Vagary is able to spawn mites as well as survive a good many explosives herself, she would likely destroy Chief, if Sabboth does not, whoever chief decides to attack first, the other will kill him.
if through sheer luck he gets through that, he gets to the guardian and thats going to be difficult, the thing itself is incredibly strong, it launches energy doesnt it? and is itself an incredible strong and large being, combien that without much cover and Chief will go down, either way, he isnt getting past cyberdemon
The Eyes occassionally fire plasma if i'm not mistaken, I don't recall him having a ranged attack. But he covers like 33% of the map at all times becuase he's that big.