Togekiss can run Tailwind in a way similar to Agility on Metagross, with the benefit of not being removable by switches, etc. like Agility is. That way you can focus on bulk and outspeed everything in the tier at the same time. Seeing as Togekiss is able to switch in completely safely on ground and dragon moves (and with that SDef, many special moves as well) setting up Tailwind shouldn't be a problem. The only downside is the fairly short duration of the move.
I also think Togekiss can be more than just a dragon killer. Its stabs hits Dark, Fighting, Bug and Grass types super effectively as well (not to mention, it has a double resistance to fighting and resistance to dark). Togekiss can cause more than a few problems for popular pokemon like Conkeldurr, Breloom and even Tyranitar. However, Dragonite and Haxorus and Garchomp pose a problem for Togekiss - Dragonite is at the same speed and Haxorus and Garchomp plenty higher, and both have assess to a now super effective Iron Tail. Garchomp has Stone Edge as an option as well.
Considering that the majority of dragons in OU are actually able to outspeed and kill Togekiss, I'm not sure if it'll be as great as everyone claims. It'd be alright with some support though. Galvantula and Shuckle are the best options for Sticky Web support - In this case, I would definitely lean towards Shuckle. Unlike Galvantula, it can set up Stealth Rock as well. Shuckle can also severely cripple an opposing pokemon with Power Split (pretty much halving their ATK and SATK, and returning it to Shuckle. This strategy was always underrated in my opinion. Picture Mega Garchomp having its attack changed from 482 to 266, and Shuckle going from 50 attack to 266) and proceed to deal some damage with Stone Edge. Or just Toxic + Encore. Togekiss would also benefit from baton pass support - any speed boost pokemon is ideal for this one and with Scolipede gaining speed boost this gen as well as complimenting Togekiss's type, stats and coverage nicely Scolipede could be a prime supporter. It helps that Togekiss gets baton pass as well and can pass the benefits on once its done.