...and bingo! Now I see why the leaves are burning. I need to maintain a lower VPD still. Perhaps that particular strain needs a low VPD throughout.
VPD #'s
This strain- 1.3-1.5 (75/76 leaf temps)
Strain #2- 1.1-1.2 (73/74 leaf temps)
Strain #3- .92 (71 leaf temp)
Tent temp 77
Tent humidity 53