we finally beat this guy by changing our sound settings. DBM and bigwigs fail to time the lightning storms accurately enough to base your collapse time on them.

In your sound/chat settings menu turn off music and sounds, and turn ambient sounds (or ambience) on and all the way up. When lightning storm is about to happen you will hear rain crescendo, as soon as you hear it, collapse to your designated spot. When the storm is not in progress you should hear crickets and frogs.