I'm not that concerned about throat hit but I've heard some flavors just naturally deliver more TH. Cinnamon, mints and menthols, (i like wintergreen occasionally) or if you're adventurist... red pepper and wasabi.
I've heard that a lot about menthols. I'll try an 18mg or 12mg menthol and see if I'm getting any TH. With my new flavor (Kona Cream from VR) I haven't had consistent TH on my LR attys. With my menthol, it doesn't matter what I use and I get TH every single hit.