Once «Ward Cheese» was nerfed, players immediately found a brand new effective strategy for defeating bosses quickly — «Lifestorm Cheese».
Lifestorm Cheese is much easier to set up than Ward Cheese. All you need is Lifestorm and Searing Light.
With the recent buffs to Searing Light, 10% of all healing done will be converted into damage. With Lifestorm healing for millions and being able to crit, this will convert to a massive amount of damage, in addition to providing Haste buffs to your entire raid group and some damage itself!
The important thing when using Lifestorm is getting as many people hit by the Lifestorm circles as possible. If you stack in a corner, all 3 Lifestorm circles can overlap, tripling the healing and damage! Even if you manage to stack only 2 Lifestorm circles, this is still a very high amount of damage. This strategy is definitely worth it in 10 man content, but especially worth it in Mythic 20 content because more Lifestorms and more players to heal.