The 410HLF has a significantly lower sensitivity than the 810e. You'd be wasting your time and effort to pair them, especially with a HPF IMO. Basically, you'd hardly notice the 410HLF is there.
By all means, feel free to pair them. Try them with and without a HPF. See if you get any weird sound stuff going on or if you like the result. Phase issues don't hurt your equipment so you can look at it as a science experiment.