When all 8 parameters are on point to NSW, consistent and stable for at least 3 months, you can go ahead with confidence......strong lighting needs to be available.
The nem must be healthy and in no way bleached.
Remember carpets are viscous, mags usually are usually in poor shape, BTA, about the easiest, but if your going to have it as a host for clowns, match them up accordingly.
Once in your tank, it will wander for a bit and may sting your SPS, so keep that in mind.
You may also want to post in the nem section....there's a member called Daveocean who is clearly an expert in this area + clowns....
Hope that helps a bit...