SMITE

Hera

As Hera, have Argus get 2 kills in a single lifetime.

Argus is Hera's Ultimate ability. When activated, Hera brings Argus crashing down at a location, damaging and knocking up enemies. On landing, Argus will attack the nearest target. Hera can control where Argus moves through refiring this ability onto an enemy or if he has a target, to recall him.

Simply use your ultimate when enemies are near low health and target him to attack those enemies. Tactically drop him onto enemies for kills and make sure to keep an eye on his health. From dropping Argus, you have a maximum of 40 seconds to gets two kills with him, or until he is killed.
I would probably suggest trying this on Arena, however be wary that Argus can be wiped out quite quickly, although his health does increase per level.
I'd recommend building items that increase your magical damage as Argus gains a portion of the power that you have (55%). My build at the time of unlocking this achievement was Boots, Gem of Isolation, Spear of Desolation, Soul Reaver, Obsidian Shard and Mantle of Discord.

I can confirm that getting a kill dropping Argus on someone counts, where Argus then chases after
To help get kills while dropping him in, I recommend pairing up with someone like Ares, Da Ji or Cerberus, who can pull enemies in to one point, allowing you to drop Argus right on them, or with someone like Odin or Cabrakan to trap enemy gods in a certain area.

If you negative vote, please leave a comment as to why, and I can improve this solution.