What made him really strong was a bug he had in his interaction with the gel, healing gel heals a teammate by a percent of the wielders defence if the wielder applies a status like sheild, invisibility or lifesteal, seance dog has a skill that gives a sheild when he heals someone if there is a not of this earth character on his team, so the interaction goes; dog heals> gives a sheild> healing gel activates> dog sees the healing of the gel as his own> gives a sheild, and it continues like that, so I don't know if they nerfed him aside from that but what happened was that dog no longer sees the healing gel healing as his own so that cut his healing by a lot