Notes for par scores on all levels:
Par scores are heavily influenced by par time.
During "par time" all scoring is tripled.
After "par time", you have 10 minutes where your multiplier goes from 3.00x down to 1.00x. For example, if you kill an elite for a pop up of "+200", the score will show 600 during par time, but then will trickle back down to 200 when the multiplier goes down to 1.00x (and will be 400 if the multiplier is at 2.00x).
After the "ten minute down to 1.00x" period, one of two things happen:
1. You get a 2nd grace period, of about 10 more minutes. Multiplier is already at 1.00x so nothing else happens with it.
2. All positive scoring is done. All kills show up as red "0", but you will still lose points for dying, team kills, or checkpoint resets.
After that (Par time + 10-minutes + possible grace period), all positive scoring is done no matter what. Negative scoring is still active.
If you've already achieved the par score, you'll still have to beat the level while making sure you don't have enough negative scoring (deaths) to go below it.
For this specific mission:
Level: Long Night of Solace
Par Time: 25:00 minutes
Par Score: 45,000
Skulls: Catch, Famine, Fog, Thunderstorm, Tilt, and Cowbell (non-scoring but accelerates explosions)
At the beginning of the mission, stay left and sprint ahead to the end. You'll quickly come up to 4 grunts - try to take them out with a grenade for some easy kills. Once you reach the door, you only need to kill the enemies at the door. The elite is the hardest, plus a few grunts and shielded jackals. After killing them, then most of you're scoring will be done in the space battle. However, right before you jump in the ship, pick up that sword in the hallway.
So the goal for my was to get 135,000 points during the space battle so that way I would be covered (Par score of 45,000 x 3 = 135,000). There are a ton of enemies and as long as you don't die your points will keep on coming.
The 2nd part of the space battle involves a Covenant Corvette. As soon as this part starts (you regain control of your ship) dive down for about 6 seconds and then look forward. You'll face the docking station of the Corvette and kill 5-8 banshees right away. Instead of destroying the Corvette's 4 engines, keep killing enemy ships. Once you have a good buffer (150,000 points or more) or you run out enemies, proceed with the rest of the mission. Once you dock on the Corvette, remember that sword you picked up. You can use to easily dispatch the elites in the first section.
You'll likely run out of time for scoring because this is a LONG level, but you should have enough points banked from destroying enemy ships. Good luck!