For anyone pondering if they should even try this, here's something you should consider:
This hold contains what might well be the best frustration-prevention-device ever: The level-partially-clear-gate. Once you've solved fifteen (out of 24) required rooms, you can exit the level (and the hold). This is not really a new concept, but something I have never seen realized in DROD before.
This makes the hold actually pretty approachable. There are still quite a few rooms that I can't imagine I'll ever beat, but others are quite doable.
Oh, yeah, I should mention that the one-level-hold is divided into thematic sections. Approachable sections (in order of my personal taste of descending approchableness) are the dagger-section in the northeast, the general section in the north and the guard-pushing section in the south-east. Once you've solved them, you already have 12 of 15 rooms, meaning you'll only need three more from the other sections (which is possible).
However, though I loved how this kept motivating me, it poses an interesting question: How do you rate the difficulty of a hold? No, that wasn't rhetorical, how do
you do it? So far, I've always conquered a hold, only solving the secrets I could on the way, and rated how difficult it was to do that. Mastering a hold always seemed a bit of a bonus to me (which I rarely succeed to do because of my short attention span). Of course, Dischorran's ajseukdjg (that was the name, right?) completly averts this scheme, but otherwise I found this a quite reasonable approach. If this level-partially-clear gate however gets used more often in the future (which I hope for), what does that mean for the difficulty rating? Only conquering this hold wasn't that hard, maybe 6.5 or 7 brains. Conquering all required rooms however is probably more around 8 or 8.5 brains. What would you do?
Anyway, what I was trying to say, this is a pretty cool hold with some very cool puzzles, and it's also approachable for non-optimizers like me; well done!

No rating yet as I haven't solved the remaining required rooms (and don't get me started on the secrets), but definitely worth checking out.