First thing is scrap that itinerary
If it was me, I'd do 3 days in Bangkok then the rest in Pattaya.
Once you get to Pattaya, you will not want to leave. You will have the best time of your life. No ifs, buts or maybes. You will think you have found heaven
Then next holiday, even though you will be busting your gut to get back to Pattaya, go to The Philippines, have a few days in Manila and about a week in Angeles City.
Now you would have experienced two of the best places in SE Asia and can make your own mind up which one you like the best.
If you do stick to your original plan, then after you have been to Pattaya, you are going to be mightily pissed off for the rest of your holiday.
All the best with your choices