I actually tried using Metrolinqs on half of this link when they first came out, but I was never able to get it to even link... but I'm not sure if the 64.8ghz channel was supported at the time, so maybe it would be different now?
I guess a realistic option might be to split the 24ghz link to two hops as well, which should easily get the availability I want, and then bond it to a 60ghz link to add capacity... Speaking of bonding, it looks like the Siklu 2x00 series only has 1Gbps ports... so I'm assuming to get full capacity I would have to bond two ports together? They aren't doing like Ubiquiti and calling 1Gbps full duplex 2Gbps are they?