On Juggernaut you can just ToK and stand in the borer drill for 300-400k ticks, if you do it right. Better than running after a mine and getting knocked up I think.
- Just from two ToK's.
A lot of ground based DoT effects go crazy with ToK as has been brought up several times in the past. A few other notable ones are Sha puddles on Immerseus, Superheated on Siegecrafter, Fiery edge on Klaxxi and that's all that comes to mind right now but I'm sure there's some others.