When the test realm was open me and a friend each used a henchman fighting Jotun and his brothers in Grizzleheim. We couldn't have won the battle without either them or more friends. I don't know if you can use more than one by yourself but give it a try and let us know.
I did give it a try and you can buy multiple henchmen...well, at least two. :) I like this option, although it's pricey. I'm working on DS and going mostly solo. I will find the option useful if I need to finish up a multiple-battle instance and it's getting late. Guess I'll need to try and start those earlier in the evening. :)
I just finished using 3 simutaneous henchmen in one battle. I was fighting the coven in Grizzleheim. Each of the 4 coven members had 4200 health. The three henchmen worked out great - only one of the died. It was a bit pricey, but I wanted to try it anyway. I don't plan on doing it again, but it did work out good.
Once again if the minions were made better to battle like the henchmen, wouldnt all of you rather summon your own multiple minions, WITHOUT CROWNS, and battle with you. KI should of thought of this idea. But instead they invented a new way for people to spend more crowns. I have used the henchmen. I still strongly believe that summoning your own minion, THAT YOU EARNED BY DOING QUESTS, that could duel with you would be great. I am not to happy with my water minion(Storm school). It would be great if he actually really dueled with me like the henchmen do....come on KI. At least look into it