A long time ago, I had some fun in the forest phantoming up with a random player for some goofing around against invaders (not specificly ganking... we'd often pull back when the other was engaging). At one point, we had two forest hunters show up within a minute of each other. So, we paired off and separated the phantoms to take them on separately.
All my opponent would do the entire fight is turtle behind his shield with a spear, circling around me constantly trying for a backstab. It was really pathetic overall, since I countered his movements and got in a hit when he failed an attack. That caused him to back off (still turtling), ending up at the cliff's edge near Alvina's spot.
I decided to teach him a lesson on how turtling can fail. Keeping within 2 or so weapon's reach from him, I switched over to my pyro flame and unleashed my trump card at the time, Fire Tempest. Since his back was to the cliff, he had nowhere to run... so when a pillar of flame caught him, it send him flying over the edge.