Re: CoiniumServ - open source & high performance pooled mining server software

yes you should set correct diff settings for x11.

Any direction where and what to patch in the source code to achieve this ?

https://github.com/bonesoul/CoiniumServ/blob/89d8c71012972981f97cb80ba4aecb95db7f1572/src/CoiniumServ/Algorithms/Implementations/X11.cs

oh and there is hundreds of altcoins there most even without standard interfaces/api. so it's impossible for us to get guides covering them all.

Dashcoin is somehow not your average altcoins, direction how to use CoiniumServ with that particular coin should be available but nowhere we can find the correct difficulty implementation needed to have the block accepted by the daemon.