its all tier 5 after the first, the next one that spawns is another herald of terror
as for difficulty, it really just depends on the monster you kill and what aura they roll. its still Herald Tier 5 but if its spawns as a noob monster it wont feel stronger or if it spawns as a monster with projectiles it might feel stronger than the others etc
ok ty good to know, is there a reason the 5th herald drops nothing but garbage killed terror twice now and just random blues......