No offense but did you take that picture in a mirror or something, everything's backward on the box art? should be a interesting build though.
As for the essential's you've already got most of it, but some stuff that I find handy is a set of small files, sandpaper, some diffrent glues, a set of side cutters for cutting sprues, some small pliers, mostly you need needle nose pliers, but a bunch of clamps, some markers, both permanent and washable, pencils, Brushes of diffrent sizes, some bondo spot & glazing putty, or some type of model based putty, some tooth picks (don't laugh there handy for detailing), some pins, lots of diffrent ,masking tapes (I don't know how many times tape can be extremely handy) I think that's it. hope it helps