Elemental 4-piece tier 10 bonus change

[Deralte]

'Your Thunderstorm Ability resets your Lavaburst CD and increases your damage done by 18% for 15 seconds.'

Or something along these lines.

[Aoundril]

While they're thinking about the 4-set perhaps they could make a ridiculously OP set bonus as a place holder and also as compensation for giving us a 7-day cd on elemental mastery.