Benjamin Olson
Hero
Which is why I'd personally rather have the Chronurgy Wizard's Convergent Future for this fight. Sure, it's a reaction to use it, and sure, it gives you a level of exhaustion when you use it, but that's what your simulacrum's for (if you so choose to use it for that instead of any of a number of other things).
If they're allowed then the Simulacrum is for sending to the fight instead of yourself. You stay a mile away (your homunculus can keep an eye on things for you there), and if they manage to get the opponent on the ropes drop a Meteor Swarm on them. If it doesn't work out send another Simulacrum the next day. Rinse and repeat.
The prospect of a multiday conflict brings to mind the importance of being an Elf or someone else immune to the Dream spell if your opponent has that. You don't want to be the one who stops getting long rests.