6D
Stealth Bomber,
According to CVCX, for a 6D, S17, DA2, DAS, LS heads-up game with 70% pen, a HiLo counter playing one hand with a 1:15 optimal spread achieves a SCORE of 27.72. For the same situation but with 8D and 80% pen, the SCORE drops to 25.98.
Hope this helps!
Dog Hand