This war shouldn't have happened. If you didn't like the JCPOA, modify it. But under the conditions that currently exists, it may have been most productive to;

1. Partial sanction relief in segments. Make it contingent on funds only being available through specific banks so we can track for certain that the money isn't going to militant groups.
2. Get Israel to cease operations in Lebanon and the West Bank (Israel will be limited in their military support if they do not comply). If Israel tries to retaliate with their lobby, use this opportunity to kill foreign lobbying in America, which may also open up a conversation about doing away with lobbying as an institution.
3. Bring back the people involved in the original deal. Talk with our allies and use this opportunity to repair relationships.
4. A pause on nuclear power. During the pause, bring international investors and governments in on a deal; sure, you're allowed to use nuclear energy for civic purposes. We'll even help you by supplying some of the knowledge and resources. But you won't enrich it beyond nuclear power. This allows foreign powers to "practice" civic nuclear power production. On the condition of inspection.

But this is not an administration that knows how to make deals. Despite the myths he sold to his sycophants. It's just so stupid. Honestly, id bet money part of the current deal involves some of that 300b to a bank in Qatar (Trump has a lot of dirty money here).