Found: Reliable 8kun IP address
So I cycled through all of the 8kun addresses to see if one or more of them actually work reliably instead of going dead every so often. Some addresses are unresponsive 1 time out of 3 and others 1 time out of 5 or so. The only address that is consistently working is this one:
23.163.176.229
That address is not even assigned to 8kun. It is assigned to dailystormer.su which is a Vanwanet client so that's why it works. This is very suspicious. I'm thinking that Vanwanet is deliberately sabotaging 8kun. Or it could be the DDoS protection service which, as far as I know, is still DDoS-Guard (https://ddos-guard.net).
This is just a preliminary report. I will post again if I notice anything else.