Adding 2 front heights to 5.1.4 = 5.4.6?

In short, I don't see a Dolby Atmos configurationfor what I'd call a 5.1.6. Nor does my Denon AVR-X6800H have a speaker config for it.

I currently have a 5.1.4 atmos setup with heights in the ceiling 45deg in front and rear of the MLP as in that linked page. I have a large and long room with a pool table behind the MLP couch and feel it is too far and I don't really have room on that far wall for speakers behind the pool table. I feel the biggest hole in my dome of sound is between the front ceiling heights and the LCR. The LCR speakers are 12' from the MLP. The front ceiling heights are 4.5' in front of the MLP, hence there is 7.5' between them and the LCR. The ceilings are 9'.

As such, I was thinking the next best location would be front in-wall mounted heights above the L/R speakers, aimed slightly down to the MLP. That would create a smoother transition from upward motion sound betweent he L/R and the front ceiling heights. But I don't see a valid "5.1.6" configuration option.

Could I choose the 7.1.6 configuration but instead of the front ceiling speakers, move them to be on the front wall? Or would the timing be off as it is expecting that front height speakers to only be 45 deg (4.5' in my case) in front of the MLP...they'd instead be 12' in front of the MLP.

In short, I don't see a Dolby Atmos configurationfor what I'd call a 5.1.6. Nor does my Denon AVR-X6800H have a speaker config for it.

I currently have a 5.1.4 atmos setup with heights in the ceiling 45deg in front and rear of the MLP as in that linked page. I have a large and long room with a pool table behind the MLP couch and feel it is too far and I don't really have room on that far wall for speakers behind the pool table. I feel the biggest hole in my dome of sound is between the front ceiling heights and the LCR. The LCR speakers are 12' from the MLP. The front ceiling heights are 4.5' in front of the MLP, hence there is 7.5' between them and the LCR. The ceilings are 9'.

As such, I was thinking the next best location would be front in-wall mounted heights above the L/R speakers, aimed slightly down to the MLP. That would create a smoother transition from upward motion sound betweent he L/R and the front ceiling heights. But I don't see a valid "5.1.6" configuration option.

Could I choose the 7.1.6 configuration but instead of the front ceiling speakers, move them to be on the front wall? Or would the timing be off as it is expecting that front height speakers to only be 45 deg (4.5' in my case) in front of the MLP...they'd instead be 12' in front of the MLP.