TK uses dual sword while other tanks use Duals, but problem here is that TK aoe skill has 2 times longer cooldown. That makes it much harder to solo farm.
https://l2e.global/wiki/petitions/623
Update: just checked other tanks, they all have same cooldown, 6 seconds with full OBT Buffs, and around 9 secs with regular npc buffs and regular dances. That aoe skill is irelevant