Mercs better is you keep them form low lvl?

[Gapen]

Well, when I was level 1, I got to NM Act2 and hired a Defensive merc (For Holy Freeze), which was level 2. (1 level above me ;o). Was planning on waiting till about level 80 to train it, but after training it until above level 8, I gave up since it still had 40 HP and I didn't wanna get it to 20 or whatever it needed to gain more HP since it always died in 1 hit. So, I just hired a level 78 merc and leveled that. It is best to higher a lower level merc, but due to just saving time and frustration, I would only get a merc at about level 30 or so that you're planning on keeping and level that one up.