The way you guys have it all makes sense for regular round, oval & rectangle pools...
I would be interested in hearing from some people with "odd" shaped pools too

I have a lazy " L" shape & I don't know if this is the correct placement or not but everything seems to be moving well:
In the shallow end I have a universal straight piece sticking out about 2"... so this ends up actually pushing water into the middle of the deep-end when the pool-devil pro isn't attached... when the devil is attached, it brings the returned water up to the surface and pushes it along the side of the shallow end...

In the deep-end I have the eyeball pointed down & to the opposite side of the skimmer... The skimmer is about 4 feet from this eyeball. The pool is 12' deep & so I'm trying to get the heated water, ( we have a heat pump), to the bottom of the pool.

This may not be the best config, but it seems to be working well. I don't have heat spots & the bottom of the deep end seems to be the same temperature as the surface.
The "floaties" are getting skimmed out. particularly by the pool devil...( which is awesome & I highly recommend it if you have tree debris problems); some debris gets stuck around the ladders, but I suspect that's normal. Over-all I'd say the water movement is good