Didn't knew about LFs subgroups, thaks for enlighting me.
However, with their current stats, some of LFs are just seemed much worse then others to me, without "but". Anyway, their effective firepower in group fight is limited by powercore and guns efficiency.
I doubt if LFs need to have subgroups. We already have 3 fighter classes (LF, HF, VHF).
They should be balanced both in 1*1 and group fights, at least within their class, just like VHFs.