Well this looks my stable peak -
https://imgur.com/a/v7X9J im worried abou that last chip having 77 temperature do u think it will be alright ?
a really nice overclock. What are your voltage settings? Your temperatures are perfectly fine. I can't give you any guarantee, but if you have cheap electricity and can handle the noise I would let it run at these speeds.
If you're worried about the last chain, you can clock that chain down a bit to i.e 575 Mhz and lower the voltage a bit too to get it to ~73 degrees as well. Let chain 1 and 2 run at the settings as they are now.