Hi I've been looking all over the place for an answer to this, and to my surprise I don't think this has ever been done. The reason I say that is because in my world that I've been playing on I actually found 2 Ocean temples extremely close to each other (they're only 68 blocks apart, and they're still on a very similar lateral plane). My question is, if I was to clear out both of them and gut the temples to make room for farms, could this set up be more efficient than a single guardian farm set up? (despite the dead space).
As of now, I actually cleared out an ocean temple very close to where I was building my base (I'm using the Gnembon exp set up), and not much further away I found the pair of temples (there is actually a 3rd that's 102 blocks from the middle one, and they do make something like an L shape, but I think that would be too far away to work given guardians spawn at a 128 radius around the temple). If the double set up in fact could be more efficient, I would totally take up the opportunity bc of how rare of an occurrence something like that is as is.
Thank you so much in advance!
(Image #1 shows the 2 temples together in perspective, Image #2 shows all 3 with the 3rd one far away in the distance, Image #3 shows the distance between the 2 temples and the midpoint of 34 blocks, the likely killing area)
As indicated in a thread in the discussion forum, apparently guardian spawn rules have changed and guardian farms aren't working (at least the way they used to). What you're proposing sounds like it would work with the old rules since you could be within 128 blocks of both at the same time (i have not tested this distance but it is what everyone seems to think is the max distance for guardians to keep spawning), but it might not work now. If you try even just one farm, I would love to hear of any unusual spawning behavior you see. I'm some time off from trying it myself in my current world, and my farm in my old world no longer works (if it did work I'd run a test for you).
I do have one currently set up much closer to my base, it does seem to be working like normal (however I doubt it's at max efficiency, there's still probably some cave lighting that needs to get done I'd imagine, that and I'm playing on Xbox one before the better together update). In that middle area of the two temples I aforementioned, yea I do probably intersect those spawning spheres, but there's a couple things I'm still trying to figure out for certain: 1) how deep underground I'd be able to make the killing chamber, and 2) there's a possible 34 dead blocks of space in the latter ends of each temple, even with that would I have more available spawning spaces (thus better efficiency) with the double set up? Id test it if need be, it would just be a massive pain to clear 2 temples worth of space without knowing for certain.