Bangkok - Safari world, Grand Palace , Wat Pho (Temple of the Reclining Buddha)
Wat Phra Kaew (Temple of Emerald Buddha), Gems Gallery,Calypso Cabaret Show. MBK mall for Shopping,Night Market Phuket - Patong Beach, Bangla Street( Walking Street),
Simon Cabree Show , Spa,Nightclubs.
#phi phi island & James Bond Island But recommend Phi Phi Island . There is no point in shopping @ Phuket as you get cheaper in Bangkok . Pattaya - Full Party place ... eat drink sleep mode.
I would not recommend to go to Coral islands as there is nothing Much to see there you can Skip it. Bangkok to Pattaya 2.5 Hrs By Bus.
If you are planning bangkok pattaya phuket why leaving out krabi. as its an outstanding place my favorite of all these four. take a ferry ride from phuket nd travel to krabi.visit emerald pool and phi phi island ,book a stay in railey beach and if you are lucky enough u can see glowing planktons on the beach itself.