It may be dependent on your build, Rogue was the character I beat the campaign with first and got to WT4 first, it was pretty painless.
Used melee Flurry/imbues with Close-quarters combat and combo points. I think it helps that most of the core skill aspects for Rogue (flurry, TB, Barrage) are available from the codex, so you don’t need to rely too much on drops.
It may be dependent on your build, Rogue was the character I beat the campaign with first and got to WT4 first, it was pretty painless.
Used melee Flurry/imbues with Close-quarters combat and combo points. I think it helps that most of the core skill aspects for Rogue (flurry, TB, Barrage) are available from the codex, so you don’t need to rely too much on drops.