Mordheim List Help needed

Hello everyone, the local gaming club and I have started up on Mordheim, and, I think I like the look of Mercenaries. I was thinking of playing as Marienbergers. I made a list, and we will feature a campaign of probably 30+ games. Here is my initial startoff list:
Captain:
Heavy Armour, Helmet, Brace of Duelling pistols :170
Champion:
Light Armour, Shield, Helmet, Spear: 80
Champion:
Light Armour, Shield, Helmet, Sword:80
Youngblood:
Buckler, Sword, Toughened Leathers, Helmet:50
Youngblood:
Toughened Leathers, Helmet, Buckler, Sword:50
That comes to 430 and I don't know what Henchmen I should buy. I have 170 points left, should I buy marksmen? Swordsmen? Warriors? I am trying to go for a balance in shooting/combat. Is this advised?
I also heard that Mercenaries are under powered at most, are they right? I mean, I see Skaven and Witch Hunters being very powerful, but Mercs don't have any "speciality". Or am I missing something here?
Any advise from you guys would really help me out as I don't want to be an underdog for 30+ campaigns and get crushed every time.

I've only played Mordheim a few times, but from what I remember Mercs do indeed have a kind of underdog status. Their main advantage is a decent weapons selection list in comparison to the others (Tomb Guardians had a really naff choice of gear, though getting a wizard and 3 wound leader helped...)

Marienburgers always seemed like the weakest Mercs to me though - only getting a bit of cash isn't great in the long run, whereas Rieklanders and Middenheimers get permanent buffs.

I wouldn't pour too much into fancy gear to be honest, I preferred numbers and loads of henchmen. But then my early games were against the Carnival of Chaos and Tomb Guardians, so I was rather desperately trying to gank tough expensive individual models...

Armor is pointless IMO. Get max heroes, two hand weapons, and plenty of henchmen. Worry about gear later. Helmets can be life savers. One of the few armors I bother with at the start.

Launch your hench men into the danger zone so you can get most of your heroes into the wyrdstoneroll at the end.Maximising gold and purchases