What can my brother do to do better against me? (Chaos VS OK)

[Kilroy]

My brother and I were playing recently and I realised I beat him all the time, without mercy. We play 1500 pts on a very hilly 4X4 board the list I run is as follows:

Chaos

Exalted Hero
Shield
Ogre Blade
Favour of the gods
160pts

Chaos Sorcerer
Lvl2
Chaos Steed
138pts

2x 5 Chaos Knights
Full Command
500pts

10 Chosen Warriors
MoK
Extra Hand Weapons
Full Command
280pts

14 Chaos Warriors
Full Command
Shields
254pts

10 Marauders
Great Weapons
60pts

2x 12 Marauders
Shields
120pts

Marauders act as meatshields and march ahead of the rest of the army. Very easy list- Point to play, its just point and click

My brother uses something along the lines of the following
A tyrant

A bruiser

2 units of 6 bulls
Full command
Iron fists

3 Ironguts
Full command

2 units of 2 Lead Belchers

About 30 gnoblars Sometimes in one or two units

And a stone horn.
What could he get to dramatically increase his ability to combat me?

[Liam]

Ok, If I was looking at building an army around taking you out, I'd look at the following, it should work, though be warned, his list has what I'd concider to be a fair few less an optimal choices, so a few new models are required. Also, just so he knows, Leadbleachers are a 3+ Unit, so he can't have 2x2 anymore

Slaughtermaster (250)
Bruiser, Battle Standard Bearer, Heavy Armour, IronFist, Dragonhelm (148 )

7 Ironguts, Full Command, Standard of Discpline (346)
20 Gnoblars, Trappers Upgrade (75)
20 Gnoblars, Trappers Upgrade (75)

4 Mournfang Cavalry, Heavy Armour, Ironfists, Full Command (310)
1 Sabertusk (21)
1 Sabertusk (21)

Stonehorn, Harpoon Launcher (250)

Army Total = 1496

It's a simple list. He now has a character who can still fight well (heck, it's got ogre stats), can buff his army and help against your magic. The General and BsB Both go into the Ironguts, but hold back, he doesn't engage unless he can be sure to win the fight, preferbally going straight though you, or able to combat reform to charge the following turn into yet another unit he can go though in a turn, your units are fairly small so he should be able to go though them all (bar maybe the 14 warriors) in a single combat. The Trappers protect the flanks of the deathstar, if your knights charge in, one dies, all of a sudden thats a risk, if he's lucky, it's two dead, don't say it won't happen, it might not, but it might. The Mournfang unit will once again, go though anything, and as long as the Stornhorn doesn't charge headfirst into your choppy character, he should go though stuff as well. Basically, it's a list which on the turn it needs to, it buffs up, goes in, HARD, and makes sure that you can't counter. The Sabers are there to annoy you and make sure the fights are on his terms, but it's general tic-tacs which'll help, not me building a list

[experiment 626]

What magic lore is your sorcerer using btw?

If you're using shadow or death, take fire to give him an easier ride. Shadow & death magic have "we're an auto-win vs I2 armies" all over them with spells like pit and purple sun. Mindrazor is brutal on chaos troops as well, and the hexes & sniper spells really hurt those low model count, average Ld ogres as well!

[dirtycrabcakes]

Is your brother using the new book? If so, 2 units of 2 leadies is illegal. I run a unit of 4.

I would run a full unit of 12 bulls (I usually run 10).

More ironguts

3 units of 10 gnoblar trappers instead of 1 big unit.

Try using his tyrant as a slaughter master & tell him to pay for a hellheart.

Make sure his bruiser is a BSB.