1750 points Army List

HQ

Company Command Squad, Bolt Pistol (Company Commander), 4 Meltaguns, Officer of the Fleet, Chimera (Multi-Laser, Hull Heavy Flamer) 177 Pts

Elites

Ordo Malleus Inquisitor, 2 Mystics, Emperor's Tarrot 47 Pts

9 Psyker Battle Squad, 1 Overseer, Chimera (Multi-Laser, Hull Heavy Flamer) 165 Pts

Troops

Veteran Squad, 3 Meltaguns, Chimera (Multi-Laser,Hull Heavy Flamer) 155 Pts

Infantry Platoon 335 Pts

• Platoon Command Squad, 4 Flamer, Chimera (Multi-Laser, Hull Heavy Flamer)
• Infantry Squad, Autocannon, Chimera (Multi-Laser, Hull Heavy Flamer)
• Infantry Squad, Autocannon, Chimera (Multi-Laser, Hull Heavy Flamer)

Fast Attack

Vendetta Gunship 130 Pts

Bane Wolf, Hull Heavy Flamer 130 Pts

Heavy Support

2 Medusa, Enclosed Crew Compartment, Heavy Flamer 300 Pts

2 Hydra Flak Tank Battery, Heavy Flamer 150 Pts

Manticore Rocket Launcher, Heavy Flamer 160 Pts

This sort of list seems to be working for people, from all the posts I've read on the Internet. Since I am not too good making lists from scratch of my own I decided to go with something like that. I went for redundancy rather than spamming. So I opted to take several units that fulfill the same role rather than taking the same unit several times. This makes the painting much more interesting for me and offers more tactical maneuvering in the battlefield.
Since people have been playing heavily mechanised armies in 5th edition I new I needed to concentrate on anti-tank weapons. The company command squad and the veterans are loaded with meltaguns to take out AV 14 stuff like Land Raiders. Their BS 4 along with the "Bringing it Down!" order (making weapons vs vehicles twin linked) should do the trick I suppose. Then we have the 3 twin linked lascannons from the vendetta which will be able to kill AV 13 fairly easy. Then I got a ton of weapons to deal with lightly armoured vehicles (AV 10 and 11). All the multilasers from the chimeras, hydras and the autocannons from the infantry squads are more than enough.
Bane wolf, heavy flamers on chimers and the platoon command squad with the 4 flames will help clearing out any horde armies (if anyone is playing with one these days). Then all my heavy ordnance stuff (Medusas, Manticore, Battle Psyckers) can fulfill a dual role, being equally good at destroying enemy armour as well as clearing massive chunks of infantry.
I read about a nasty trick of how to protect your artillery units. Usually I will have them hanging of the back, away from harms way. My biggest concern is stuff deepstriking close to them and taking them out in a round of shooting (drop pods containing metlagun wielding space marines for example). People have been using the following trick in order to counter that. Using an Inquisitor hanging back with the artillery inside a Vendetta you are sure to prevent deepstriking near that area. By having 2 Mystics with him, the Inquisitor can make on of your units (within 12'') to shoot at anyone that deepstrikes 4D6'' from him. And since the Vendetta gives him a very big footprint, that area becomes quite massive. So if a drop pod deep strikes anywhere near your artillery it will be greeted with 2 Medusa Ordnance shots. Or if a multi melta equipped Land Speeder dares to deepstrike close enough if will get all the shots from the Hydras. Very nasty trick indeed. I also included officer of the fleet (-1 to enemy reserve rolls) so my opponent will think twice before holding stuff in reserves in order to deepstrike them later in the game.
One last thing. Getting the 1st turn with this list is quite important so I equipped the inquisitor with an Emperor's tarot. Everything sounds good in theory so far I just need to get some practise games now!