Detonate - "As Zeus kill three or more enemies who have three charges on them with Detonate."Explanation:
This achievement is earned by getting a triple kill with Detonate (3rd ability/
on Savage) while each enemy has 3 (max) charges on them. The easiest way to apply full stacks on 3 different enemies quickly enough that they don't fall off is through your Ultimate Lightning Storm (4th ability/
There are two things to consider when getting this achievement; enemy health and timing. Lightning Storm does a ton of damage so you need to throw your Ult when they have a high amount of health. If you are close in levels shoot for the 80% mark. If they are too low of health the Ult will kill them and you will not satisfy the requirements for the achievement. Once you see the third lightning strike in your Ult's animation you need to trigger Detonate immediately. There is a delay when casting this ability due to the animation. If you wait too long to trigger Detonate a forth lightning strike from your Ult will hit and potentially kill an enemy.
If you have any corrections, tips, or tricks comment and I will be sure to edit/ add them.