I have a 5'2" Vanguard kite construction. It's very light, I've not seen a standard construction so have no idea how much difference it is, but mine is quite a bit lighter than my light wind TT.
I'm currently 88kg and thinking that the 5'2" might be a little small, but I'm still getting the hang of directionals in general (I purchased this one 2nd hand and have not kited with a surfboard before, except for one hour trying a mates 6"). Definitely need to keep moving, and it is really only an issue in lighter wind when a standard TT would have long stopped and sunk - but again, practice might fix the opinion for me. it has given me the push to loose the final kgs to get back to my preferred weight
Pretty sure the Vanguard has less overall rocker than the Vader so you should be able to run a smaller vanguard.