I am running my second acks campaing, and this time my new players are more into dungeons. And i cant find good old school modules/dungeons for mid levels. any sugestions? favorites? ideas?
i've got a game with players close to this level as well so this is relevant to my interests.
Jaquay's Dark Tower. One of my favorite dungeons.
http://grognardia.blogspot.com/2009/01/retrospective-dark-tower.html
My main suggestion is to take dungeons you like and scale them up or down a bit as needed if you feel comfortable with that. The main thing to keep in mind relative to B/X modules is ACKS cleaving. If you're looking at AD&D modules consider options in the 6-8 range or lower, and for DCC modules I'd suggest levels 4-6 might work as a baseline.
You'd have to scale it up a bit, but I'm very taken with The God Seed Awakens. (DCC)
http://irontavern.com/2014/07/14/review-the-god-seed-awakens/
I've never run either, but a lot of folks on dragonsfoot seem to have a high opinion of X4 Master of the Desert Nomads and X5 Temple of Death. (Expert)
In a similar desert-y mode, I only played through a The Fantasy Trip conversion of it in the mid-80s, but we had a blast in I5 Lost Tomb of Martek. (AD&D).