While I probably won't be able to help (aside from spreading the word when it's done), I'm very excited and happy to see this thread popping up. Lion Heart has made some great stuff in the past, yet no translator seemed interested or able to tackle them.
I remember Mystical Chain only had very little story-text, and that even menus and battle-exclamations were already in English just to be stylish. Tenjou no Tempest however, someone once told me that game seems just a little too complicated to enjoy for them with the whole shop and configuration for shots, skills and specials, all in Japanese. Breaking that language barrier would definitely make it more accessible.