What about kills per time?
Yup, anyone who thinks flying extremely timidly is good for fighter rank has no clue wtf they are talking about. K/D reaches its point of diminishing returns at about 5:1, anything more than 10:1 is just for personal amusement and has ZERO positive effect on your overall fighter rank. However, the more timidly you fly the worse your K/T, which is an extremely competitive sub-stat, it almost never reaches the point of diminishing returns, all the way up to 15-20+ Kills/Hour. So, flying timidly is actually a guarenteed way to totally screw your fighter rank.