Even 6 energy refreshes in a day - 3x 50 crystals and 3x 100 crystals - it still only nets you 54 tickets. Assuming you get 1 ticket for every 20-energy sim.
(6*120)+135+240=1095 energy per day, 20 energy per sim = 54.75 sims
You'd have to do another 3x refresh - 3x200 crystals to get you another 360 energy, to run 16-18 more sims to get 16-18 more tickets. So, for one day's farming to get you 70 tickets... you would have to spend 1050 crystals.
Additionally, given that you would need 70 sims of 20-cost nodes, which would be 14 hard nodes (at 5 sims per day) with 20-energy cost. There's only 12 light side nodes like that, so you would have to spend 25 crystals twice to refresh two of those nodes once.
So, that's 1100 crystals in order to get 70 tickets in one day.
I suppose that all changes if you get better drop rate than expected on the lower cost nodes. I've once or twice gotten 5/5 sims on 16-energy cost nodes. Of course, just as many times (I'm sure), I got 3/5, so...
Losing that much in tickets hurts a lot, even if you do not try doing it all in one day. If you do try in one day, and use 1100 crystals to do it and lose the 70 tickets...