Some players prefer a super-fast Poe instead of STH, or they run both. Poe taunts, gives tm down, and also expose. The net effect is roughtly the same as the 30% tm gain from the Han ST taunt.
You can run a fast Poe and a slow Han ST - the opponent tm down lets your AOE toons to throw bombs against exposed opponents (LC, Wiggs, JKA), and then Han ST follows with HIS taunt, you gain another 30% tm, you LC throws his second AOE which hits much harder than his first (check his skill description), and the fight's almost over at that point, and your opponent may have had one or two of their fast toons take a turn, single dps that are irrelevant in this scenario like Rey, QG, or Leia