So, I've been TRing for the past 3 months now. And everytime, before I tr, I have to make a new sigil farming the necro quests at level 20 or else I'll have trouble (or simple will be bored) with it when I'm level 16. And this is a major problem of necro 4 I think.
I think those quests are great, seriously, but getting a whole sigil is such a pain.
My suggestion: make the sigil drop rates scale with difficulty like tor scales. On normal, you get 100% for 1 sigil piece, hard 200% for 2 sigil pieces, elite 300%, 3 sigil pieces.
This would bring us to not repeat the quests more than we should/want AND still flag for litany. Because, as you might know, litany is one of the REALLY FEW quests for level 17. Or, at least, one of the few really worth it.