I've no personal experience with strobes other than the pair of DS161 I currently use. The units are kinda clunky and heavy, but I've managed to get decent (In my humble opinion) photos with the strobes.
During a recent trip to La Paz, Baja California Sur, I did experience a failure with one of my battery packs. This left me with one working strobe for most of the trip. The one strobe that worked provided enough light for me to get workable images. I guess output with DS161's is as good as other strobes if positioned correctly. Check out the La Paz Folder in the portfolio section of www.cortezbluephotography.com Most of the photos were done with a single strobe.
Power consumption is probably not a major issue for you, but for what it's worth... A couple of other photographers in my group were using other strobes. They were changing batteries after a couple of dives every day. My DS161 battery lasted all day.
I'm not sure what happened with the battery pack that failed. Ikelite backed it with their warranty and requested that I return both battery packs for service. They repaired the one that failed and serviced the one that worked.