thanks so much for your replies, I didn't give you a lot to work with I know.
chapter tactics can literally be any one as I am field the loyalist version of my homebrew chaos warband, mainly so I can slip the missile launchers into my chaos list and have a painted representation. I was thinking iron hands for the extra survivability and so I end up with a dread that recovers hull points in addition to rerolling damage.
I've managed to get a storm shield off my brother for use on my captain (shield eternal looks so useful!).
my current meta consists of a dark angel player (my brother) who is a bit of a plasma addict. a tyranid player who goes gaunt heavy (has over 200 painted gaunts and one game managed to get all of them onto the board at once!).
but the guy a really want to beat is my doubles partner Philip who like me fields chaos with a heavy emphasis on maulerfeinds, noise marines (when not fielding drakes), and zombies. I need a way to kill them in great numbers because he literally takes 70 zombies minimum to each game.
I'm stuck for ideas as the easiest way to kill zombies is the flamers and frag missile launcher (although that flamer assault marine combo shows promise), but I don't see this as effective against noise marines plus the rhino he buys for the noise marines is always used to Sheppard zombies form point to point meaning the zombies aren't as slow as I like. leader for him is a fun option of typhus and a dark apostle with
MoT and the scrolls of Magnus jammed in with 20 now hateful zombies.
dreadnought is going to have to be able to kill pretty much anything he has as his anti armour stems from maulerfeinds (kill them and he has no way of reasonably dealing with a dread aside from a zombie tarpit) so I was thinking assault cannon and power fist with storm bolter (tankred load out) and having him covered by a tactical squad (eye of terror formation, a trick I pulled by sticking a hellbrute in the middle of a ring of cultists so he couldn't be assaulted and had a 5+ cover at all times

) dread should kill a maulerfeind due to the higher
WS and I4 but the problem is he has more fiends than I have dreads, 2 of them will take him apart, and he is the prime target from an armour point of view
As for captain loadout I was thinking of making him a company master and taking a shield eternal, teeth of terra, artificer armour and meltabombs and possibly giving him the primarchs wrath if I have points. eternal warrior from the shield should stop him being killed in one by his maulerfeinds and meltabombs should down a fiend if he tries that move. the teeth of terra is for killing noise marines and the primarchs wrath is nice for shooting stuff. the orbital barrage is reserved for typhus's face
any criticisms welcome