wowwowwow you really dont even understand how your own coin works do you? the block target of each algo is not relevant at all in this situation what is relevant is the gap between blocks as they actually come in regardless of algo, if blocks come in a few seconds apart which is common for digibyte and those blocks take longer than a few seconds to validate then the entire system falls apart, the reality here is that you changed the block target to 15 seconds without any proper understanding of what you are doing.