Looks like you are almost there
One thing I would say is that an OG of 1.070 is high for a traditional Saison... you are pushing 8%+ and this is more in line with Dupont Moinette and other "Super" Saisons. You would have a much easier and quicker time getting it to finish low (1.004 - 1.006) if you started around 1.055 - 1.060.
My current all-malt Saison had an OG of 1.057. I just checked the gravity this morning, 6 days after brewing and it's under 1.008. I used WLP565, mashed long and low and have been fermenting at 85+.