Think about how many Lore books you need to find to progress in the Mages Guild... Or dolmens for the FG.
A lot!
Honestly, you don't have to do that many DB jobs to rank up. (5 or 6 per rank? Something like that.)
It just seems more tedious because you're likely doing them all at once, instead of spread over a long period of time like the other guilds.
If you don't like "repetitive kill quests" than maybe the Dark Brotherhood is not the guild for you.
Also, the daily Sacraments earn you more rank experience, so they help.
Think about how many Lore books you need to find to progress in the Mages Guild... Or dolmens for the FG.
A lot!
Honestly, you don't have to do that many DB jobs to rank up. (5 or 6 per rank? Something like that.)
It just seems more tedious because you're likely doing them all at once, instead of spread over a long period of time like the other guilds.
If you don't like "repetitive kill quests" than maybe the Dark Brotherhood is not the guild for you.
Also, the daily Sacraments earn you more rank experience, so they help.