Hey man, welcome back to csm
! I hadn't played since 5th then picked up 8th a couple of years back and have loved it since.
Looking at what you have you need a heavy marine focused list. Unfortunately only black legion with Abandon or Red Cosairs can run them well in this edition.
Are they the old night lord models or generic csm
? Either way you could run them with red cosairs rules (they have a stratergem to recycle marine squads and 3x csm
squads gives you extra command points). Nobody will mind as long as you explain you're using their rules.
You could run 3x squads of 10. One with 2 plasma and combi plasma, one with 2 x reaper chaincannons (you'd need to stick some bitz on those havoc heavy bolters or buy some barrel bitz there's loads to choose from) and one with 2x melta and combi melta and the rest with ccw
and bolt pistol. That'd give you a solid core and 11 command points.
Bikers would work well as a harassment option. They can now rapid fire their bolters all the time even at 24".
With daemon prince and sorcerer that'll get you to around 1,000 points. With the rest of the list I'd take some heavy artillery and some tough objective holders.
Terminators aren't bad now they've been made cheaper and can take chain axes. So for 28 points you get a lot of bolter/plasma shots and a tough body to hold them.
Daemon engines are the hot topic right now, the new lord discordant model is cool and has great rules. But really you can run a lot of stuff with the special detachments. You could take raptors and warp talons in the host raptorial detachment, they would stack nicely with the nightlords rules and fluff. Or if you want to go shooty havocks and oblitorators in the devestaion battery detachment are fairly tasty.
Hope this helps