The problem our blockchain is facing is quite common and has been studied by other teams.

At the moment, two auxiliary algorithms DarkGravityWave and KimotoGravityWell have been added to the Cyberyen core. As we can see, this solution only helps us knock down the hash raised by large pools. But these algorithms don't help us maintain network stability and we see long freezes.

Barrystyle has added a retargeter algorithm that will start at block 149,999:
https://github.com/cyberyen/cyberyen/blob/bfb8f7397b5c119ebcb90ea7d2e0d1416eb8bd84/src/pow.cpp#L15
Let's see how it affects the network.

Also check out the DigiByte articles, maybe you will have some ideas:
https://dgbwiki.com/index.php?title=DigiShield

https://www.reddit.com/r/Digibyte/comments/213t7b/what_is_digishield_how_it_works_to_retarget/?utm_source=amp&utm_medium=&utm_content=post_body