I dont want to not help you but unfortunately I dont play the games that you have mentioned. If I were you, I would check each game's performance on the shortlisted cards online. Youtube videos, toms, anandtech, hardware canucks, hardware unboxed, linustechtips, tech deals etc. are good reliable youtube/online resources that I take my time to read/watch through so as to make the right decisions.
If I dont find answers to my questions then I go by cost to performance ratio. I dont know how much 1070ti will cost or how it will perform but I would keep my eyes open for reviews. Also, the games that you have listed are more CPU bound than GPU so if I have to take a guess, it would seem like 1070 should be enough for 1440p/75 Hz. But, I would want to know the lowest 1% and 0.1% frames to make my final decision. In your case, my advice would be to wait for 1070ti to come out, check out the reviews and then decide if its worth the price increase.