Some interesting observations…
Callagadra is more dangerous than Uber Bobr now because Bobr is a DPS check and if you can get past it, he is not much of a threat atm. Cally meanwhile has those annoying Tornadoes and if you are using TDM potions on top… yeah…
The extra kiting required made Cally kill times for all 3 of my top builds more or less the same as you can see above. Yes, it got worse after using Amplicorum due to both the pets and the player getting extra damage taken debuff.
Another thing to note is that as of this comment, only my Nurgle Bath Bombs - Ghol's Pet Cabalist is able to boast clearing all contents without relying on double rare items 
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Gameplay wise, FireWood - Beastcaller Pet Conjurer is actually the easiest to play because it has the most damage and can opt to not take the TDM potion modifiers and still kill everything. It also has the least amount of active button pushing required. Downside is that its “tankiness” comes from killing things before they can kill you. It cannot facetank anything. Also, it relies a ton on those double rare greens to achieve its performance.
Fluffy Woofy - Ice King Pet Conjurer has become my new Fluffy Squishy. No, it does not have the same Facetank capacity, but feels pretty comfortable to play and atm, I am kind of not a fan of Bysmiel’s Trinkets. So… after years… Fluffy Squishy has been dethroned and is not even in my top 3 anymore .