ooh ok im taking this chance to just reminisce bc as it happens, my most favorite ones are all unfinished or not available anymore by the author(s).

To Seek Asylum by athousandordinarylemons

https://archiveofourown.org/works/1281328

starts off as a davekat college barista meet cute that then unfolds into your typical homestuck shenanigans of realities within realities to try and make up for mistakes made during the session. its essentially an RP between the two authors and the back and forth between them weaves some pretty cool worldbuilding, also exploring some other unusual pairings and making them Work. to this day some of these rarepairs stand out in my HS shipping list solely because of this fic.

A Lullaby for Gods (deleted)

this one was crazy. it was a crossover au of homestuck and marvel characters but it evolved into a huge HUGE story involving the authors OC's and other fandoms, im pretty sure there were some Welcome to Night Vale characters in there. i genuinely cannot even start describing it but again, the author handled this huge cast swimmingly and was going to make different arcs to deal with both Thanos and Lord English. i have no idea if they will ever come back but this fic kept me up for weeks and waiting for updates like it was homestuck itself. hoping the author is okay wherever they may be.