Best Way To Farm Shotgun Kills For New Light Players?

Solution 1:

You can no longer get the Felwinter's Lie shotgun, but for anyone looking to farm kills, you can either do the Escalation Protocol on Mars, or enter the Whisper mission and go to the thrall room under the big open green area with the parkour. The latter has infinitely-spawning thrall and the only downside is the 20 minute timer.