It is really strange that a 1080 ti to make that low amount. Probably you can put it to mine Cryptonight V7 and it will at least do better than that. I am not sure though as the only times I have had to deal with 1080 ti it was on customer PC-s and they were mainly gaming PC. I am sure though that this amount can be more with the 1080 ti.
Unfortunately for the 1070 I am afraid you are right. It is best at mining Zcash and Zcash profitability after the ASICS hit the market is worthless with GPU-s now.
as I know, Cryptonight V7 is better for AMD.
I'm mining RVN and for today I get arround BTC 0.00012 / each 1080ti and BTC 0.000085 / 1070.
I'm using z-enemy miner (sometimes I'm trying some new miners, yet I couldn't find better). What about the pools... I'm looking for better than yiimp.eu.