Converted Leads import timing causing integration errors

Summary:

Looking to the Eloqua hive mind for some help!

We have automation set up in SF to auto-convert leads after creation, which happens within a minute of Eloqua creating the lead for 80%+ of our leads. Because Eloqua lead scoring is not immediate (as advertised) there's a few minutes delay from when the lead is created in SF to when Eloqua then has a score and sends an update lead call to pass the score.

The problem we face is that the fastest frequency on our converted leads sync is every 15 mins, which means when Eloqua sends that update lead call, it's already been converted in SF, but ELQ doesn't know that yet because we're waiting on the next converted leads import. We don't want to add a wait step to delay the create lead to wait for the score, or for the update lead for 15 mins, because we're trying to get speed-to-lead and have the score in SF as quickly as possible so we can route the leads for fast follow-up.