"Educated Guess" values have been recorded from Corecraft test server which isn't a primary source (credit for that research goes to NiM and Shiro). However, when I've tried to verify some of their values now and in the past, they've come out pretty much right and in my opinion are preferable to any guessed values and can be used for the time being until primary sources are studied.
It should be noted that Coilfang/Hellfire instance values were recorded with less rigour, such listing damage values as they appeared on Corecraft instead of looking at actual ability behaviour from WDB (and then adjusting it if there's evidence of nerfs) so don't copy them blindly.
Mob
Damage
Health
Mana
Abilities
Immunities
Source
Comments
Bogstrok
2777-3927
26463
0
Piercing Jab for 139-161% damage
?
Bestiary
N/A
Greater Bogstrok
4797-6783
27350
0
Decayed Strength
?
Bestiary
N/A
Coilfang Slavehandler
4400-6051
28114
0
Head Crack, Hamstring for 1000-1050
?
Educated Guess
N/A
Coilfang Champion
4050-5650
28114
0
Cleave for 110% damage, Sunder Armor, Intimidating Shout
?
Educated Guess
N/A
Wastewalker Slave
850-1140
9431
7322
Frostbolt for 1300-1780, Frost Nova for 1040-1180
?
Educated Guess
N/A
Wastewalker Worker
670-840
9694
0
Rend ticking 450/stack
?
Educated Guess
N/A
Coilfang Observer
2770-3880
21881
3155
Immolate for 2571 and 750 ticks, Heavy Dynamite for 1640-2080
?
Educated Guess
N/A
Coilfang Soothsayer
760-1130
19144
7196
Arcane Missiles for 1000, Domination, Decayed Intellect
Lightning Bolt for 2390-3130, Corrupted Fire Nova Totem for 5700-6400, Tainted Earthgrab Totem root ticking 158, Mennu's Healing Ward ticking for 2300-2700, Tainted Stoneskin Totem
Immune
Educated Guess
N/A
Rokmar the Crackler
4700-6654
169371
0
Grievous Wound for 3150-3850 and ticking ticking 1096-1463, Water Spit for 1619-1881, Ensnaring Moss, Enrage at 20% for +213 damage and 60% attack speed
Immune
Bestiary
N/A
Coilfang Tempest
1800-2200
27350
0
Dual Wield, Sinister Strike for 2600-3000, Deadly Poison ticking 245-375
?
Educated Guess
N/A
Coifang Scale-Healer
830-1250
21881
3155
Holy Nova for 1260-1510 (double healing), Heal for 23500-27000, Power Word: Shield for unknown Absorb
?
Educated Guess
N/A
Quagmirran
6273-8871
179334
0
Cleave for 110% damage, Uppercut for melee+360, Acid Spray ticking for 1425-1575, Poison Bolt Volley for 1968-2531 and 701-998 DoT
"Educated Guess" values have been recorded from Corecraft test server which isn't a primary source (credit for that research goes to NiM and Shiro). However, when I've tried to verify some of their values now and in the past, they've come out pretty much right and in my opinion are preferable to any guessed values and can be used for the time being until primary sources are studied.
It should be noted that Coilfang/Hellfire instance values were recorded with less rigour, such listing damage values as they appeared on Corecraft instead of looking at actual ability behaviour from WDB (and then adjusting it if there's evidence of nerfs) so don't copy them blindly.