After Battle of Dazar'alor heroic week hotfixes, Explosive Potential has become a very desirable trait to use even single target. The correct play is to try and aim for the highest uptime on its Haste buff while trying to minimize the amount of globals spent casting Implosion outside Tyrant. In order to do so, you want to cast Implosion every 15 seconds with at least 3 imps out.