How do you set up Harmony to work with Bond Using IFTTT as a “man in the middle”? Or is there some other way with SmartThings?

Where did you hear that those particular models worked with Harmony? I don’t see them listed in the Harmony database:

Also, in any case you would Also have to have the Insteon hub to make all of that work and that’s going to start increasing the cost very significantly. And the complexity.

There is an alternative solution using similar devices for the Lutron Maestro fan control that will definitely work with harmony. That’s option five in the fan control FAQ:

FAQ: 2019 Ceiling Fan and Dimmer light wall mount control compatible with SmartThings and Alexa?