Me personally, it's the Hive. Spending just over 5 days on the Dreadnought will do it.
How about you? What enemy race have you killed the most?
-
1 ReplyHive, between the still relevant dark beyond mission used to farm bounties, and the vanilla loot cave most day one players have more thrall kills than anything, cabal is most likely next due to the glimmer farm on exclusion zone