By reading Rob Galbraith´s article about the mini and looking on how it performs (worst than every other option including the Vagabond II if you look at the tables with the recycle times ) I don´t think it is really what I would choose for location power even if its main feature is a smaller size and weight. I would go with a Vagabond II, LP 750 or Innovatronix Explorer XT than with a Mini.
There are trade-offs with everything.. Money aside, I'd rather have three mini's, each dedicated to a strobe, lasting much longer than a single Vagabond II, with a slightly slower recycle time, and weighing in at about half the weight.
It's not unreasonable for a Vagabond II to go for $375 or higher (used). Three VML's would be ~$720. So given a three light setup.. at just under twice the price, you get better performance (3 dedicated VML vs 1VII), much longer lasting power, and still coming in about 50% of the weight of the Vagabond II.
If you do enough outdoor work, an extra $375 for longer/faster/lighter would definitely be worth the money (IMO).
It's not a 1:1 comparison where the VML shines performance-wise, but its ability to scale at an affordable price makes it very useful.