Do a Kang flip over a dub flat/rodeo. They look better and the last 180 is just natural, set it less vertical. I did dub misty's first then slowly moved into dub corks and then flats. Corks are much harder than flats but once you get the natural feel down it comes nicely. Same with all the others.
I'd definitely say double lincoln or double misty without a doubt, unless you're more comfortable with front and backs then what are you waiting for?