As far as the dieting goes, if you have not lost any weight since Jan, something is wrong. Losing fat is a long, slow process and Tri-max and hardcore dieting isn't necessary if you're doing things right. Fish is an excellent source of protein and fats, but I wouldn't recommend an "ALL fish diet."
I would never recommend not training legs. Not to be rude, but I'd be willing to bet that once you lose a little more fat, you'd be surprised to see that your butt probably isn't as big as you think. Thats what happened to me anyways.
Or you could just ignore all my advice and hire Bobo.