You only need battlechest + MoP + WoD

Rarely seen people still active in old content, i mean raiding old content using old gear. No buying expansion wont earn u 30days sub, that's the pain of US server

just buy the digital version it's oni usd 20 + 20 = 40 usd = rm 131 ++ (Source)

i remember last christmas i buy the bundle (starter version + MoP) version which cost usd 15 ++ which includes a 1 month subscription of the game so i tink this applies i the MoP digital version plz kindly check here https://us.battle.net/shop/en/product/game/wow for product detail . Good Luck Have Fun 

btw the starter version has all expansion till cataclysm on it so it's like the battle chest but new version but without the MoP version u won't be able to level up to lv 90