If you want to see a successful Hybrid pet Cabalist, you will need to work around Reap Spirit.
The first build uses disposable Blight Fiends alongside the Black Scourge pets you get when you kill enemies with Reap Spirit. The second one uses pets that are immortal, so you can focus strictly on your own defenses and don’t have to worry at all about pet survivability.
If you want that swarming feeling, I’d go with the first build - the Chaos one. It’s a hard build to pilot, as all hybrid pet builds are, but it’s capable of doing well in SR and any other Main Campaign content you want to try.