Alright fellow forums it is Tmb some of you may recognize me, but that it doesn't really matter if you do or not.

So I just got into 6th edition recently, took a while for me to get the rulebook, but now I would like to your opinions on how to expand my basic army.

HQ
Herald of Khorne (plain)

Elites
6 Flamers (Useally 2 Squads of 3)

Troops
10 Bloodletters
10 Pink Horrors

Fast Attack
(None) probably should get some

Heavy Support
2 Princes of Nurgle with Iron Hide and wings
Soul Grinder.

So I'm thinking of getting more flamers, bloodletters, plaguebearers, nurglings and screamers.

Thanks I'm completely open for any and all ideas.

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Every stone turns to dust

6th edition is a very ranged combat version of 40k i find the most effective lists are based on a shooty platform. I suggest more horrors, fateweaver, and some tzeentch heralds. Having a flying bloodthirster is quite nice as well. For fast attack i would get some screamers. The new rules for them and flamers make them two of the best units in the codex. I like running multiple small units of horrors with several icons and have the flamers deepstrike off those icons and clean house. you can even throw in a herald in that unit to help out.

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Chaos Space Marines 3500+
Chaos Daemons 4000+
High Elves 2000

Our good friend Caim isn't wrong, exactly. Shooty lists are stronger now than they were in 5th, but you need to remember that 6th is more balanced than 5th was, in the shooty vs assaulty aspect.

Assault heavy armies work too, they just aren't a guaranteed KO anymore.

Looking more at your list, I like your fairly big squads of troops, and the flamers are a great idea, though I would advise fielding them as a single squad of 6, to give them extra survivability in numbers. It also makes the unit virtually immune to being assaulted, as anything charging WILL be destroyed in overwatch.

If you want Fast Attack I'd advise Screamers, the buff they got recently makes them incredible anti-tank and anti-terminator troops, and with their 3 attacks each they can even be useful against horde armies. Never forget that they're jetbikes, with the crazy jetbike turbocharge.

2 princes of Nurgle and a Soul Grinder is a lot of points for your Heavy Support, if you ever want to shift things around to get more upgrades elsewhere I'd advise taking the wings off just one Prince, even when walking they're devastating units. You don't mention if the Soul Grinder has any upgrades, I would advise taking Phlegm at the very least, I run mine with both Phlegm and Tongue personally, it gives you some great shooty options, though I can understand the points cost is prohibitive for what might amount to a one shot wonder.

Your ideas for expansion are good, the only things I would advise are these: We have great HQ's in the army, maybe take another HQ once your army expands a little. I never take to the field of battle without my Bloodthirster these days, he's just too good to resist. And lastly, take some Icons in your army. I see SO many people arguing against them, but my logic is this:

If you deep strike a unit to an advantageous position and the Icon survives the first turn of shooting, the rest of your army can ALL appear in that same advantageous spot. A squad of Bloodletters usually hides about 4 squads of deathness in my games, I actually use my heavy units (Bloodthirster, Soul Grinder, Flamers) as distractions on turn 1 so that my Icon can get full effectiveness. I've won my last 8 matches (I'm in a campaign) so that should tell you the usefulness of that simple strategy.

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My tanks are better than your tanks. But it's okay, your everything else is better than my everything else.
Except Commissars, of course. Commissars are awesome.