I think the best option is to ask your company to send a non-smoker to Singapore. I did read that perhaps an option is for your doctor to write a prescription for your personal vaporizer with a letter stating a good purpose for it other than smoking cessation.
As far as hiding it and going for it. Cartomizers would be easier to hide than tanks. Juice can be hidden in those travel shampoo, purell, eyedrop, etc type bottles. The G6 batteries would be easier to hide than Triton batteries. The usb charger shouldn't be a problem. You might could hide batteries in flashlight or something like that. IDK I'm just trying to help keep you from being on CNN & FOX news as the first Halon to be caned for ecig contraband.