Those are good pictures. Looking back through the previous posts I'll add my .2 cents worth. Running 2 strobes and 2 video lights would be very heavy and cumbersome. I will run a video light on one side and a strobe on the other if I think I will need both. You can still get great macro photos with a single strobe, strobe placement just becomes more critical. The video light can also act as a focus light, if needed. Looking at the pictures you provided, it appears that your husband is past the beginner stage so, and this is just my opinion, a TTL only strobe will be outgrown very quickly. I would recommend you start him off with a strobe that has both TTL and manual control, like the Inon S-2000 or the Sea & Sea YS-01. He can start with TTL as he experiments with manual. It will save you money in the long run.
Regarding the ring light, I stand by my previous thoughts and still think it will be less useful than a strobe. The ring light is great for things in the open, that are stationary or slow moving, and that don't have eyes. Things like nudibranch, anemones, maybe Christmas Tree worms; but you have to get close with it and shining that bright light on something with eyes will cause it to retreat. Also, it adds bulk to the front of the housing and can be limiting in tight areas where macro stuff likes to be. If you decided you want to go the ring light route, the Weefine 3000 that Nemrod suggested in the way to go. It is bright and has a limited strobe function. It will cost you as much as a strobe and you will still need an optical cable for the strobe function. It's the one I use and I really like it but I have to realize it's limitations when I use it.