Rugby.com did a break down based on win %s, which ends up mostly being in line with last years table (the worse you did the harder your draw looks):
www.rugby.com.au
Looking at the games and where they are, Crusaders as the hardest does look to hold up - doubles against the Chiefs, Blues and Canes, a trip to Fiji with an away game against the Hurricanes immediately after then home to face the Blues. Just after the middle of the season this could break them if they have started poorly again.
Moana having all their doubles against kiwi sides is really going to hurt them too, I'm surprised they didn't get the Drua twice.
The tahs is a bit each way but might also come unstuck in the second half of the season - after an easier start the back half of the comp is tough away trips (Fiji, Perth, Canberra, Eden Park) and top teams from this year (Brumbies, Reds, Canes, Blues and Chiefs). If they're outside the 6 after the first half of the comp the pressure to chase may see them fall right away. They do get the best possible bye though - the week after the trip to Fiji, where most teams have struggled.