Yes they are. That’s why I said I said I think it’s effectiveness is questionable. It’s action intensive and can be card intensive. Although Rebuild Corpus mitigates the card intensive part somewhat.
I am admittedly more familiar with the TT side of Yan Lo, so maybe there’s a tactic on the rezzer side I’m missing
Edit: Thinking about it, it’s not too bad With Manos and Yin. Manos leaps, siphoning himself to damage himself and get sudden strike. He can then hit Yin 3x for a min of 8 damage to Yin and 4 to himself using Siphon for all 3 attacks. Then Yin can attack Manos and with min damage, can kill him with 2 actions. Then Yan Lo can kill Yin with min damage and rebuild corpus 2x to replace both. If you have 2 Gokudo this will be a 0 model net loss. This is the only only way I can think that’s not card intensive, but if someone can kill a Gokudo between activations, you lose an Ancestor, so it can be risky. It gets more card/action intensive if you want to kill something other than these two specifically.