This would be a daily mission that would give one person 24 hours to complete. The mission entails the player to solo kill

1 Common NPC
1 Uncommon NPC
1 Rare NPC
1 Elite Boss NPC

the exact NPCs would be chosen at random, and could possibly be from a new NPC faction that would be exclusive to this mission chain. An XP bonus would be awarded at the completion of the mission and loot drops would be normal. All NPCs in the mission would be Matched enemies.

To make this more fair to lower levels, an XP bonus could be awarded at the end of each defeated NPC. the NPC could drop say, the normal loot drop + Severed Captains Head which would be the artifact required to complete the mission. When the entire mission chain is complete the player would be awarded either

20%-Tri-Matrix Emblem
30%-Alien Star Charts
30%-Star Chart Purger
10%-Terraforming Device
10%-Quasi-Spacial Expander

This mission would end after 24 hours and would reset to the first round of the mission chain each day.

These completed missions would not go towards the mission rewards count. However they would go to the completed missions count.

Interesting idea. Though this is, again, going to benefit higher level players than can actually burn through those types of NPC's. Still, I like the concept.

Maybe instead, make this a Daily Reward instead of a daily thing for everyone. That way higher ranked players can't just keep doing them and continue to gain sick artifacts.
If so, you would need to modify the rewards. Lose the Tri-Matrix and maybe replace with some sort of Cache or Parts Vault.

i agree. Interesting, although it might be a little difficult for low level people. I have seen things like it in other games. Maybe, make it a timed mission, where if the player can kill five NPCs in a row, they get a nice reward, or something like that.

imagine a matched elite enemy for someone rank 500. the Dark Ring has 60,000 hull at level 100. imagine trying to solo it at rank 500 and it having 300,000 hull. it may be a little easier for the higher levels, but it will still be a challenge.