Based on simple empirical approach, pointing 1080Ti towards XZC, got me into believing that accumulating this coin is actually worth it. lyra2z algo stresses GPU a lot less - temperatures are lower more than 10C° @100% TDP (default settings) compared to ZEC statistics. Power graph shows ~2.4kW for XZC and 2.7kW when hashing ZEC. All about marginal gains these days ...