Well I think that typically this type of scenario really relies on a good RRM althorithm to help balance these off areas in a time of failure. For instance if you Odd AP switch goes offline leaving the Evens online the idea would be for the surrounding Even APs to bump up power to help fill in the gaps. Depending on spacing this may or may not cover everything.
Unfortunately I have not seen as much consistancy on the Meraki RRM as say the Cisco side. With that said, it is much more improved over where it was a few years back, but still needs to have some improvements to work more reliably for this kind of thing.
How are your devices designed to connect? Are they connecting on either 2.4 or 5Ghz bands or do you have it designed to operate on the 5Ghz band only? If you had it setup to the 5Ghz band only you could deploy either 40Mhz wide channels or even 20Mhz wide channels (if necessary, depending on channel overlap) and you could hardset the channels and powers on your APs. You could set the powers to provide the necessary overlap that you are looking for in this manor so if a switch is lost the power will already be there. This of course would take a bit of testing and tweaking to optimize it for your situation, but it maybe one way to ensure the redundancy that you are trying to design for.
I realize hardsetting those channels and powers, might not sound appealing initially, but in some circumstances it can still be the way to go when trying to hit certain objectives such as yours.
Good Luck,
Chris