Yeah apparently there's a bug on Calypso as my friend and i discovered today when looking at them. On Cyrene the "Type:" line has blue text. It says what they do. The Kill Strike increases the damage of crits, the Accuracy increases crits, and the Resilience gives you 5 extra hp.
I haven't done any calculations, but my first reaction is that the cost of the Kill Strike is disproportionate to the benefit, and that 5 extra hp is not really very useful for the cost, either.