Looking for critique. Keep in mind I want the SSD to feel like the center piece of my fleet.

SSD/B (799/800)
==============
Executor II-class Star Dreadnought (411 + 76)
+ Moff Jerjerrod (23)
+ Intel Officer (7)
+ Darth Vader (1)
+ Emperor Palpatine (3)
+ Minister Tua (2)
+ Gunnery Team (7)
+ Shields to Maximum! (6)
+ Phylon Q7 Tractor Beams (6)
+ XI7 Turbolasers (6)
+ Annihilator (8)
+ Early Warning System (7)

Cymoon 1 Refit (112 + 20)
+ Director Krennic (8)
+ Gunnery Team (7)
+ Avenger (5)

Gladiator I-class Star Destroyer (56 + 15)
+ Admiral Montferrat (5)
+ Demolisher (10)

Arquitens-class Light Cruiser (54 + 1)
+ Skilled First Officer (1)

Howlrunner (16)
2 x Tie Interceptor Squadron (2 x 11)
2 x Tie Fighter Squadron (2 x 8)

I like it.

Drop the tractors for ACMs or APTs on Demolisher.

I like Advanced Projectors better than EWS on the SSD.

What objectives do you have in mind?

Second on what @Mad Cat said. EWS doesn't help when you have many hull zones... I would drop Montferrat in exchange for Brunson, and change up your squadron ball. Your current ball will die very quickly, and it seems that they are just here to delay. I would drop Annihilator,Shields to maximum to make room for Suppressor. Here is my envisioned list:

Cleto0's Long Range SSD list

Faction: Galactic Empire
Points: 785/400

Commander: Moff Jerjerrod

Assault Objective: Opening Salvo
Defense Objective: Contested Outpost
Navigation Objective: Superior Positions

[ flagship ] Executor II-class Star Dreadnought (411 points)
- Moff Jerjerrod ( 23 points)
- Ravager ( 4 points)
- Intel Officer ( 7 points)
- Damage Control Officer ( 5 points)
- Minister Tua ( 2 points)
- Wulff Yularen ( 7 points)
- Gunnery Team ( 7 points)
- Hardened Bulkheads ( 5 points)
- Advanced Projectors ( 6 points)
- X17 Turbolasers ( 6 points)
- Quad Turbolaser Cannons ( 10 points)
- Leading Shots ( 4 points)
- Overload Pulse ( 8 points)
= 505 total ship cost

Imperial Star Destroyer Cymoon 1 Refit (112 points)
- Avenger ( 5 points)
- Director Krennic ( 8 points)
- Gunnery Team ( 7 points)
- X17 Turbolasers ( 6 points)
- Spinal Armament ( 9 points)
- Intensify Firepower! ( 6 points)
= 153 total ship cost

Arquitens-class Light Cruiser (54 points)
- Intel Officer ( 7 points)
- Turbolaser Reroute Circuits ( 7 points)
= 68 total ship cost

Gozanti-class Cruisers (23 points)
- Suppressor ( 4 points)
- Comms Net ( 2 points)
= 29 total ship cost

1 Valen Rudor ( 13 points)
1 Ciena Ree ( 17 points)
= 30 total squadron cost