You should focus on scuba in Thailand if you do scuba or sightseeing. That place has been closed for almost a year.
There is another place to jump though up north but only cessna 172 for $49 a pop to 10k (mssg me if you want someone to jump with I'll join ya if you do decide to jump there...they're looking to get a caravan not sure when). Funny as it seems like so many people are coming to Thailand in April that I know and many Asian jumpers are going to Cali or Australia.
DZ next to Pattaya unfortunately closed until further notice. it's a pity because it is really nice to jump there. but i have jumped in udon thani as well...very nice people....smaller plane but at the end of the day u will still manage to get some airtime http://thaiskydiving.com/ let me know if u go...i might swoop in from phuket blue skies!