If multipools are hitting this coin it means that it's a profitable coin to mine and that LitecoinDark is still undervalued. So nothing to worry about, difficulty is high, but mining is profitable. And they will be selling coins on exchanges at any price, so there will be coins to buy. Let's just hope that the new DifficultyShield will be good enough when multipools will stop mining and we won't be stuck with blocks for long again.