Hmmm, I'm not sure but do you guys mean this unit and weapon?
The first time I encounter that unit, it tore into my knight of zanber for 150ish damage.
I'm more afraid of that elite unit than storm dragons and death demons. 
Actually, the best of free rider's units is nasty and powerful compared to major AI's units.
If they were an competent AI faction and actually existed as a faction, I would take heavy losses from them, unless they use their Tech haxs to kill me before I can even muster a counter!
Funnily enough though, after fighting that unit's army, I rifled through all the unit customization options only to suffer in despair as I found out that I'm not allowed to have a greatsword unit. And.. I even tried to make Pariden axemen in a gilden faction only to find out I couldn't either 
Because I found out how much it appealed to me having a whole bunch of soldiers discharge their attack spells before the enemy crashes into them in melee. Has potential to significantly weaken the enemy wave unless they sports high res even when it drained my mana like nuts.
