Currently Dual Mining Eth and DCR as WinMiner thinks that's the most profitable. Using Claymore that's bundled with WinMiner. I don't really know enough yet to mine directly, but MultiPoolMiner using MiningPoolHub was giving the same results (And I think from memory, few days since I used that one, that it was using Claymore too).
I forgot to mention that the 1050ti is plugged directly into the board in the 'primary' pcie slot, with the other cards on risers.
TheMightySpud
Check the CPU usage in general if you can, also risers should not really affect the mining performance. I am not really 100% sure whether or not Ethereum uses that much CPU power but the dual mining Decred with it might have something to do with it.