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.