With respect to the guards, it depends on:
-Are we getting Hayward?
-How much will it cost to retain each of them?
-How much luxury tax is ownership willing to pay?
-How much can we get in return?
No matter what the answer to these questions, Rozier is probably gone. He's by far our least valuable guard, and his minutes should go to Fultz (or Ball). We should try to trade him for a late 1st.
If we are getting Hayward, it seems clear that either AB or IT has to go. One of AB, IT + Crowder would need to go in order to make the numbers work from a cap standpoint, but it makes no sense to deal Crowder because he's the only one not up for a massive, luxury-tax-incurring new deal. Of the two of them, it makes more sense to deal AB because IT would probably be involved in the pitch to Hayward. Presumably, going after Hayward means that ownership is more willing to pay luxury tax because we'll be contending for a championship, but almost certainly they won't be willing to pay the ludicrously massive bill associated with keeping all 3 guards in addition to Hayward.
If we are not getting Hayward, we still will be motivated to deal either IT/AB/Smart. Dealing IT becomes more attractive if he fetches the biggest return and he would cost the most to retain in '18. Depending on ownership's willingness to pay the tax given that we won't be contending for a banner, the choice might be IT vs Smart+AB. If that's the case, then we should deal IT now for the first reasonable deal that comes along. If ownership is willing to pay a higher amount of tax, then the choice is more pick 2 of 3, and the answer will depend heavily on the trade market for each player.
The least good outcome is that we start the season with all of these guys (and no Hayward) on the roster. At that point we'll be either selling for pennies on the dollar at the trade deadline, or losing at least one of these guys for nothing in FA.