The description of this achievement is a bit misleading -- as Hou Yi, your Ricochet (
) ability needs to do the following:
1.) Initially hit an enemy god
2.) Bounce off a wall
3.) Hit a second enemy god
4.) Bounce off an opposite wall
5.) Hit a third enemy god
As you can see, its a very, very difficult one to pull off legit.
To boost: I suggest boosting it in Joust 3v3. The two side tunnels off the center of the map are perfect for this setup.
To get legit: Again, 3v3 Joust may be your best bet -- try to lure all of your enemies into the side tunnels located at the center of the map (tempt them with an easy kill), then fire off your ricochet and hope for the best. Again, its a very difficult achievement, so you're going to have to get lucky.
(Edit Note: This achievement, like all other achievements is SMITE, must be done in PvP matches. Co-op matches vs AI do not count.)