i found your old tltstuck and filled in the gaps cause i had nothing better to do with my night. basically in my head it's like
first house: caliborn/calliope
second house: mindfang/darkleer, vriska/terezi
third house: condesce/psiionic, feferi/eridan
fourth house: dualscar/dolorosa, equius/nepeta (dolorosa is seventh house jane's original cav so she had to eat jake instead to ascend)
fifth house: grand highblood/redglare, gamzee/june
sixth house: roxy/dirk, rose/dave
seventh house: jane/jake, jade/tavros
eighth house: handmaid/summoner (going off of what happened with the beforans), sollux/aradia
ninth house: signless/disciple, karkat/kanaya
1st, 2nd, 3rd, and 8th i agree with in the sense that i dont have much comment on them other than "vibes" - i can see vrisrezi in the 2nd or 4th house about as equally as i can imagine karkat and equius/nepeta in the fourth based on the fact that its literally the Child Soldier planet, which fits alternia perfectly. any other houses seem more specific to tropes or character analyses that imo dont fit the homestuck cast as well! shocker but im not a huge fan of crossovers for this reason, bc trying to replace characters or positions 1:1 gets difficult when various themes and characters might intersect.
i would swap jane/jake and the strilondes because i associate the glasspits much more in the academic/unseen intelligence area (especially since jane was literally raised to learn and conquer, i can see them all more prominently in 3rd/5th as powerhouses) and the strilondes in an eternal strife with death and whatever fate might mean. but again the strilondes are also heavily fourthcoded to me (though i can see rose as sixth, and i assume you paired a lot of them from existing duo dynamics). and kanaya goes hard in the 7th house. lastly i find it hard to associate anyone with the ninth house because its so beautifully engineered for harrowhark and harrowhark only. even though karkat and kanaya have their "galaxy letdown" moments which could be associated with harrow, the ninths main purpose is to isolate and uphold a deep antichrist with fear and reverence, which is [gestures vaguely] its something rose would want to migrate to but you would have to consider how their personalities would be nurtured if they were born and raised in such an environment; its harder to reverse engineer such things and at this point its a lot like a very extreme kidswap to me
if anything i say here right now contradicts what ive said before well. my thoughts have changed it just happens