Fighter kills by hour is the most impressive stat there imo
<S> atlau
Eagler
some context:

The median is even lower, especially if you would filter out the two sortie wonders. Which is also necessary to declare Atlau actual #1 in K/H, the seven guys on top of him in HTCs k/h ranking all did only one or two sorties at most, none of them have over 14 minutes sortie time total.
Another interesting side note: Atlau is ranked #2 in k/d, #3 in k/s, #8 in k/h, #5 in hit%, #8 in kill points, which made him rightfully #1 in fighter score tour 271
In August 06 (tour 79), with those stats he would have ranked #4. #14, #36, #42 and #262(!) respectively, for an overall fighter rank of #6 (still impressive)