Memory clocks are same as regular 1070 - and core has no influence on ETH mining. I underclock cores on 1070s to 1000-1200 levels and still get same results (with much lower consumption from the wall). The highest hashrates on ETH are around 32,5 for really good cards (Zotac AMP! - able to sustain +900 (1800eff) on memories), 30-31 on regular cards and 29,5 on unlucky cards (Asus with Micron memories).
So regarding the ETH - I dont see any possibility to get higher hashes on 1070Ti - unless You manage to OC the memories like god.