I appreciate the advice! I went through another tuning session and kept your comments about CORE and MEM in mind.
Started off with:
PL = 150
MEM = 1100
CORE = 600
FAN = 80
Final config:
PL = 170
MEM = 2600
CORE = 1400
FAN = 80
Average MH per card = 31.00 MH
Average power consumption per card = 168w
Average temp per card = 55