To post a non superboss example -
Petwalker - Walking Simulator Budget Pet Conjurer used to work well enough as a budget setup for farming SR in 9.8.
The build relied on having your pets tank for you while minimizing the aggro generated by the player.
In the current SR, pets still take more damage then before, so with that build, you are going to find your pets dying too much to actually tank for you and keep you alive, making it impossible to achieve anything remotely close to pre 1.2 performance.