when i had my ss puffer I used cc as substrate and still do to this day mine loved to chew on the cc when it wasnt eating food .never had a problem with his teeth.my spiney boxfish i have now also does the same thing.as far as an anemome with a puffer or trigger i wouldnt attempt it they do have chewing habits that could easily kill the anenome.
as far as you list of fish.trigger ,violtion lion,snowflake eal.foxface and large clownfish i have had all but the clownfish (but i did have damsels) all done very well togther.if anyone will be a problem it will be the trigger i had one for a while but it bothered my lion and my lion finally stung him.others have had lions stop eating due to harrasment.but it just depends on the fish itself.other experience i have found with triggers(as you can tell they are not my fav fish)ss puffers are pigs when it comes to eating lions are predetors and like there food to be moving a bit for them to eat.snowflakes are noramally stick fed.striggers have very big appetites also and like to steel food they just constantly eat never seam to get full.foxface is an herbavore so it will need lots of greens in its diet so he will be easy to feed.but all in all you have a good match up i think with those fish.