One of the other interesting aspects of the Iron Warriors list is the Defilers being a core unit.
I have 3 formations of them (12 Defilers) and I have a lot of fun with them.
My favourite list (at the moment) is this one:
Quote:
DEFILER ASSAULT PACK [275] 4 Defilers
DEFILER ASSAULT PACK [275] 4 Defilers
DEFILER ASSAULT PACK [275] 4 Defilers
IRON WARRIOR TERMINATORS [275] Iron Warriors Lord, 4 Iron Warrior Terminator
CHOSEN [125] 4 Chaos Space Marine Scouts
HAVOC COMPANY [400] 4 Havocs and 2 Land Raiders, Stalker, Warsmith (Supreme Commander)
ARMOURED COMPANY [350] 6 Chaos Predator, Stalker
SUPER HEAVY COMPANY - DECIMATOR [225] Decimator
HELLBLADE FLIGHT [200] 3 Fighters
ORDINATUS MEDRENGARD [600] (BTS)
That has the Ordinatus (a really iconic Iron Warrior themed unit), decent AA and plenty of Fearless formations.
Another list I had some fun with was this:
Quote:
IRON WARRIORS COMPANY [390] 6 Chaos Space Marines and 2 Havocs, Iron Warriors Lord, Stalker, 4 Chaos Rhino
IRON WARRIORS COMPANY [390] 6 Chaos Space Marines and 2 Havocs, Iron Warriors Lord, Stalker, 4 Chaos Rhino
CHOSEN [145] 4 Chaos Space Marine Scouts, 2 Chaos Rhino
IRON WARRIOR TERMINATORS [275] Iron Warriors Lord, 4 Iron Warrior Terminator
SUPER HEAVY COMPANY - DECIMATOR [225] Decimator
RAVAGER TITAN [650] (BTS)
DEFILER ASSAULT PACK [275] 4 Defilers
ARMOURED COMPANY [450] 8 Chaos Predator, Stalker
HELLBLADE FLIGHT [200] 3 Fighters
I actually prefer the Ravager to the Sieglord. It's cheap enough to still allow plenty of other toys. The Ravager has a TK(D3) attack, ok shooting and is handy in engagements. That extra few cm's in movement is also invaluable!
The combination of artillery and teleporting Terminators has great synergy. It hasn't been overpowering in our games but it does force your opponent to think carefully about deployment.
Hopefully, you'll come up with some great combinations/lists as you develop your own play style.
All the best and have LOTS of fun!