Like crows/ravens, Anubs are one of the few pets that are strong x3. Anubs are pretty much stand-alone pets anyway, so losing synergy is not a huge deal. They are tanky as is, and deal stout dmg. Probably the most dangerous thing to x3 Anubs is a Fossilized Hatchling/Creepy Crate. The undead AoE will hurt all three pets badly. Honestly, Anubs are fairly OP as is, and pairing three of them together is not exactly the most noble thing to use against the community, but it is viable
. With the proliferation of undead in the queues nowadays though, don't expect long win streaks with this combo.