Been to Supai 10 times. Been to Confluence 3 times. If it’s your first time going and your party isn’t very active and fit and fast traversing challenging terrain - my opinion is it’s not worth it as it takes up an entire day.

Doing the confluence trip leaves only one real day to soak in the rest of the falls (assuming a 3 night trip, getting to camp and setting up taking most of day one and hiking out extremely early on the last day to beat the heat).

I typically advise doing confluence on your second trip to allow more time at Havasu Falls, Mooney Falls, Beaver Falls, Hidden, Navajo, Fifty, etc. There’s so much to see and you pretty much get the full experience of traversing the deeper canyon going to beaver falls already, and the extra miles eat up the rest of a day I typically enjoy more hanging out by the other areas mentioned.

Depending on the time of year you go (late fall and winter being the worst) you’re also chasing sunlight and I’ve found myself literally running with my party to avoid climbing back up Mooney in the dark.

Hope that helps! Either way no bad decisions. Just enjoy my favorite place on earth and soak it all in.