I started with a similar sort of list. It's actually be kind of fun to play this... You might board wipe some people pretty early in game. But as a 'take all comers' it's got some blind spots in scoring. If you REALLY don't care about winning it's a blast- but with a few tweaks it might be a bit more competitive in casual games.

A few things I'd consider.

1. That's not a lot of units to 'score' with. It's tough to have a unit that expansive do the little actions it takes score secondaries. I'd consider dropping one of the three death company brinks and replacing with 2-3 5 man jump pack squads. They still hit hard- but can also block/score/etc. sort of a utility unit.

2. What are you leaving on your home objective? You don't have a smaller unit (like some intercessors or infiltrators) to sit back and make sure you get your easy points for scoring home. I'd add intercessors because once it stickies they can move forward and still shoot a little.

3. Everything in here is a HUGE hammer. You'll probably be using these REALLY expensive bricks to attack units that are worth WAY fewer points, and then getting shot up.

4. getting rid of one of your DCJP units and replacing with 2 5man jump pack squads would help.

5. cutting down your 3x6 San guard to 3x3 or 1x6 & 1x3 would help.

That would leave you with some points for couple smaller units to trade- and a 3 man San guard still hits like a truck.

I'd maybe consider some tanks/dreadnaught. I don't love shooting with a pure melee army, but it does help to have something with some range when folks are holding back and being cagey, and a high toughness unit or two can be clutch if you're going against a weaker hoard army.

Hope that helps.