Given you have lived in Thailand for a number of years you should know that no one has a clue at this stage ( not even the people who make the decisions) Come back in 5 years for answers ๐
Not everything is considered a soft power. Medical, Cooking and Muay Thai although there was one random other one Never heard of anything on Thai medicine
Most people have got the DTV without an agent Join DTV FB group and just follow the requirements A covering letter explaining anything odd is a good idea but don't confuse things with TOO much info. Good luck