This test show anyone who plays warlock what type of buffs each pet needs, not rune just balancing -
starting with imp
Damage from Firebolt 62 - on level 47 warlock. without improved imp with demonic pact this increases 75-77 without improved imp
with improved imp its about 85-92 at 1.0 speed
if there was a buff to be had here be small at best i like see imp do at least 10 points of damage if not more
Fire Shield is pretty bad. but understandable while its low. though can see increase
Vold Walker - 47 auto attack damage - 35 damage (this is awful) probably main reason why it cant old threat
Damage is threat rank 4 deals about 250-300 threat. every time it activates. solution is give torment lower cooldown from 5 second cooldown to 2-3 second cooldown and lower mana cost adjust the speed
also reduce suffering cooldown to 30 seconds
Succibus - major issue is lash of pain on 12 second cd. should be way later but when did hit without demonology talent at 47 it did 120 damage but think it was crit
still little low
Felhunter - Felhunter needs shadowbite. the attack that deals more damage based on number dots and curses on it all it has is its auto attack and lowering attack power of melee
mostly a pvp pet cause of silence and stealth detection
there is some changes to be had here
What I think its abilitis should be
Shadowbite, devour magic, taint blood and group intelligence and spirits buff
as far as auto attack damage this one does most damage
finally Enslaved demons I hate classic infernal doomgaurd system they should be able be summoned like any other pets
but bad thing is they are useless cool but useless not ever gonna use them in raid