I think multimedia is the easiest.....as it applies to daily interaction with graphics we use....and i did TPS...i belive TPS neeeds fair bit of time to understand/learn.....i guess since both apply to every day situations they are te best...i dont have much clue but DSS...whilr AMS i guess has alot of electronics in it with lots of car engines crap....and if u have a teacher who knows it then do it....like my physics tutor who is also an IPT teacher in his school did AMS as he in real is an Electronics engineer...then a physics/2u/3umaths and IPT teacher (tho he only tutored me for phys and maths)
....if ur into AMS stuff then do AMS