How often, as a ST, do you use ability + ability rolls? Â They are suggested by the main book as appropriate in some circumstances, but by using them, you are partially robbing Attributes of their vaunted place above abilities in experience/bonus point cost and training time. Â My players are always coming up with crazy situations in which it seems like it ab + ab rolls would be more appropriate, but the setup of the mechanics seems to suggest that it is inappropriate to do this more often than say, once or twice a session.