I'm planning on having three vertical in addition to the three horizontal (lighting - high/medium/low) zones in my setup. I see a lot of aggressive coral placement tips relative to peaceful corals. But I can't seem to find any guidelines on placement relative to other aggressive corals - especially those in the same family - say Euphyllia (frogspan near hammer near torch).

Any tips?

From what I've seen, all my euphyllia (hammer, frog, and torch) can all touch just fine with no problems. Supposedly there are some torches that will sting hammers and frogs, but I haven't seen that in my tank (torch touching frog).