u/Consistent_Sky_5638

I'm 5k sp and One way to easily complete 25 kills with Assult 50m+ distance is to use Orion primarily because it bypasses mod shields and does back damage as normal damage, on my account I ran Orion with dual overdriver 8s, you can also use berserkers because they have good range too and spam some Team Death matches.

It took me 3 matches to complete the 25 kills from 50+ meters requirement easily. You can also Alternate Orion for Stalker if you don't own Orion