In case you hadn't seen it before, this is how you can increase the power of your strobes with Photoshop.1. Camera is on a tripod and does not move.
2. Since clouds move pretty quickly, only 3-4 shots in between the no lights shots.
3. Keep your lights from in front of anything that is important and will be in the grab area.
4. Have fun with it... there are many ways to make this technique work for you.-- don