The new Salvaged Astromech R5-P8 can cause both the attacker and the defender to take a point of damage, and maybe one of you has Greedo equipped. Also you could Tractor someone into their own Proximity mines and they crit themselves again.

Greedo wouldn't trigger as R5-P8 isn't an attack. R5-P8 separate event altogether, which requires an attack sequence to have taken place to trigger. Nor would it trigger with Dace as his ability is not an attack either.

Greedo Card:

The first time you attack each round and the first time you defend each round, the first Damage card dealt is dealt faceup.

The new Salvaged Astromech R5-P8 can cause both the attacker and the defender to take a point of damage, and maybe one of you has Greedo equipped. Also you could Tractor someone into their own Proximity mines and they crit themselves again.

Greedo wouldn't trigger as R5-P8 isn't an attack. R5-P8 separate event altogether, which requires an attack sequence to have taken place to trigger. Nor would it trigger with Dace as his ability is not an attack either.

Greedo Card:

The first time you attack each round and the first time you defend each round, the first Damage card dealt is dealt faceup.

"The attack, nor the attacker’s ability needs to cause the damage."

Greedo would actually trigger because R5-P8 is activated as the product of an attack. The same applies to Dace, all according to the general precedence set with the original Boba scenario. All of them operate using the same logic. The scenarios where these sorts of things wouldn't trigger is with damage provided from something like anti-pursuit lasers or bombs.

R5-P8 happens after the attack, so Greedo does not trigger. Dace trigger during the attack, and thus can trigger Greedo.