beetlenut,
We use max NG pulled during the flight + min NG used(only 85% or below)x the amount of times you droped the collective below 85% inflight for NG cycles.
NG95=0.6,NG96=0.65,NG97=0.7
NG81-85=0.05
I can't remember the rest of the figures, but you can find them in the Turbomeca Manuals.
As for NF cycles, 1 startup +1Flight +1Shut down= 1cycle