you can install as many faction packs as you like. But be aware that some have ships with a very high blockcount wich impacts the performance. (mine are built specialy with low blockcounts for that reason)

also Xavorion doesnt care. you find every pack anywhere in the galaxy. if you want one pack to test, it is very easy. only install that one pack and you will spawn in a faction with it.

if not then you may miss some xavorion part for that. ( i guess this: [2.5.2+] Xavorion: eXtended Faction Packs https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=3140194498 ) for more information check the xavorion main modpage
there you find everything you need. from quick install to my faction packs.
if you have troubles getting it to run or encounter bugs - feel free to check the pinned discussions section, it is also there.
( https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=2923179923 )

Im sunning a SDK settup now, xavorion doesnt play nice with so much stuff! WIll it work? Whats funny is I dont know how to test it so im just flying around seeign if I run into them. Near teh core I assume?

it is a Xavorion pack so - yes (as all of my packs)

I hope this works with xavorion! Here hoping