This doesn’t deserve it’s own thread or spot in the OP since the topic of attack command damage has been beaten to death, but I just wanted to lay out some things about it since I see some Youtube builds incorporating them more with Gamma Burst.
The pet damage formula shows that all pets do the same base melee damage. For the most part, attack commands are based of some multiple of the basic melee damage pets deal. Most of them are set at about 4x damage, while splash pets are about 8x.
This means that, at base with no points in Sic Em’, assuming each pet attacks at least once per second (which most except for maybe Beefcake do), most AC deal 4 seconds worth of damage instantly on a 20 second cool down. Even splash pets only deal about 8x damage at base, meaning that 8 seconds of basic attacks will out DPS them.
Going into each pet individually

Centurion and Scorcher  No splash scaling, and after the 7/23 their AC deal 60% of their original damage, meaning they only deal about 2 basic attacks worth of damage on a 20 second cool down. No need to explain why that sucks.

Guard Skag  it literally just deals 4 ticks of its melee damage as corrosive spit that doesn’t get melee bonus from GftE or Rad from Gamma. Again, don’t need to explain why this sucks.

Horned Skag  No splash scaling, and is dealing exactly 2 basic attacks worth or damage on 20 second cool down as of 7/23. Again, wasn’t great to begin with and is irredeemable now.

Sidekick Jabber  does 4x the damage of melee attacks, but he fires a pistol at about half of the damage of a melee attack and shoots about twice per second. This pistol mayhem scales, so by M10 it will deal about half the damage of an AC. So it works out to about the same amount as the other pets, which is trash.

Eridian  scales off of splash, but it only does 2.4x basic melee damage. It works out to about the same damage as the others.

Beefcake  His shotgun scales with mayhem, so he gets weird. At M0, his AC is already pretty weak since it only does a little more than double his shotgun damage at close range (and his shotgun deals almost 2x the damage basic melee does), but by M10 his AC and basic attacks are nearly dealing the same damage. If it weren’t for Hollowpoint, this one would be in the trash bin too.
These are a bit more nuanced

Countess  Splash pets naturally have AC that deal about 8x the damage of basic melee. Ants seems to attack slightly slower than other pets, so assuming she attacks once every 1.5 seconds, she could perform 13 basic attacks over 20 seconds. It would take 15 basic attacks to overtake the AC damage not accounting for splash.

Gunslinger  AC damage is based of multiples of the basic melee, but gunslinger’s SMG is completely separate from those values so things get dicey. Gunslinger has an average DPS of 12880 while the AC does 115566. Gunslinger’s basic attack over 20 seconds equals about 2.5x his AC damage. Splash rolls on COM/artifact bring it close, but basics would still out DPS the AC by 17 seconds IN. You need splash anointment for even Gunslinger’s AC to out DPS basic attacks.
There has been a trend in the game for attack commands to get worse as time goes on. Attack commands have never been amazing, but after the 7/23 patch and subsequent scaling changes they’ve gotten to an all time low. 6/9 pets have an attack command that does 2x or less the damage of it’s basic attack by M10. Only Countess, Gunslinger, and Eridian have attack commands that still deal more than 4x damage, and even then Eridian is still terrible even with splash, Gunslinger NEEDs splash to out DPS the SMG, and Countess’ AC only wins out because her basic attacks are so slow.
So the moral of this story? Unless using Countess or Gunslinger with splash, don’t bother ever using AC for damage.