I was thinking about crazy optimizations today and I’m surprised we don’t hear more people talk about this combo. A cleric that can cast lvl 3 spells can concentrate on spirit guardians and wild shape, and by becoming a large creature you can create a 40 ft field of fast moving justice taking the dodge action - that include spider forms, which allows ceiling walking to create the disco ball of death moving around a room out of melee reach.
I’m surprised I’ve never seen this build being abused.
Seems like a lot of levels required when you can call lightning or moonbeam and get pretty close to the same effect, without any of the multi classing downsides.
If you really want spirit guardians you could also try to talk your DM into letting you take the Orzhov Representative background (from Ravnica).