Spread the damage around, long cooldown abilities do high damage due to their long cooldowns. This means that those abilities are extremely good when used with offensive cooldowns because +15% of 50.000 is a lot more than +15% of 15.000.
A Warlock did one attack on me that took 70% of my health. I know it’s crazy right now with Corruptions and the trend is going to be the same, some abilities still do a disproportionate level of damage even without Curroptions.