So I just tried dual mining with claymore and my eth hash dropped from ~30 m/h straight eth, to 17 m/h (eth) when I added pascal. Is this a config issue on my side?
Yes. You need to reduce the intensity for the 2nd coin by adjusting -dcri . default is 30. Reduce it until you get no drop in ETH hashrate.
Btw Pascal is no longer a good choice as 2nd coin. In fact soon you'll be running in loss with more power burned than coins earned.