well the reason i attempted to solo again was because of the patch notes. not only did i not see any gain in % per kill on blues, the above problems i mentioned were after the patch.
the new solo content that is coming, whenever, may help, i dunno.
i know blues aren't the best xp, but i cant reliably test any higher con, not only because they are harder to find, but also they hit way to hard. if i couldnt evac i would be dead.