I'd do all of those except the Looker's if it's for the Sleeves. If just Dialga G, I'd do 1 Power Spray, 2 Skuntank G, and Miasma Valley, if possible. Other than the stuff you listed, I don't seem to have anything else on your wants list.
CML for
***Milotic EX*** (EM)
(Mint Condition. For trade or sale.)
***Chansey EX*** (RS)
***Charizard EX***(FRLG)
(Peeling on the left side and has a few wrinkles.)
***Gardevoir EX*** (SS)
(Peeling slightly on the bottom left corner and has a few small, unnoticeable wrinkles.)
EXs on the top of the list are priority. Lucarioand Darkrai
Your
***Milotic EX*** (EM)
(Mint Condition. For trade or sale.)
***Chansey EX*** (RS)
***Gardevoir EX*** (SS)
(Peeling slightly on the bottom left corner and has a few small, unnoticeable wrinkles.)
I have quite a few cards from the Pt2 and Pt3 sets.
Please check my list.
I'm interested in your DP6 Heatran and DP6 Regigigas, but only if they're 1st ED.