@Mossy Toes is going to be one of the best members to seek advice from when it comes to chaos marines.
However, some of the stuff your likely going to be told, regardless of what you do or do not want, by anyone that can help you will probably include:
1. Get a different army if you want to play competitive, chaos marines are low tier (true or not someone is always going to tell you this, personally it annoys the hell out of me when they do.)
2. Get a helldrake with baleflamer
3. Give those obliterators the mark of Nurgle and take them as three groups of one
4. Take two five man squads of marines in rhinos, and probably invest in two more identical squads
5. Get another terminator and take two squads of three with combi meltas/plasmas and deep strike them
6. Take a squad or two (depending on whether your told to get one or two helldrakes) of three strong bikers with meltas or flamers
Personally, given what you have and the theme around your army, I would look to swap the hammer for a missile launcher on the dred, get ten more marines, get a unit of havocs, and consider either an allied guard detachment (I'd suggest Death Korps) or the guard artillery formation to get you some ordnance.
However, some of the stuff your likely going to be told, regardless of what you do or do not want, by anyone that can help you will probably include:
1. Get a different army if you want to play competitive, chaos marines are low tier (true or not someone is always going to tell you this, personally it annoys the hell out of me when they do.)
2. Get a helldrake with baleflamer
3. Give those obliterators the mark of Nurgle and take them as three groups of one
4. Take two five man squads of marines in rhinos, and probably invest in two more identical squads
5. Get another terminator and take two squads of three with combi meltas/plasmas and deep strike them
6. Take a squad or two (depending on whether your told to get one or two helldrakes) of three strong bikers with meltas or flamers
Personally, given what you have and the theme around your army, I would look to swap the hammer for a missile launcher on the dred, get ten more marines, get a unit of havocs, and consider either an allied guard detachment (I'd suggest Death Korps) or the guard artillery formation to get you some ordnance.
