As it turns out, what was sold to me as a Soay wether must be a rigg, as he has decided to challenge my main breeding ram. Gasp...

(This is my second season with both, but I only realised the issue now - it wasn't a problem last year, as the wether was still young, and didn't dare to challenge).
The ram was separate with the breeding ewes until now, but I need to rest my second paddock now until May as this is my lambing field, so today I reunited the flock, and they started fighting again straight away. There was a lot of posturing going on, but some serious head banging too, and I got too worried to leave them to it and work it out - separated them again after 20 minutes.
The ram is now on his own in a separate small fenced area at the bottom of the main field - it's down a dip so he can't really see the others unless they graze at the bottom which is not often.
My original plan was to sell the ram as a breeding animal rather than slaughter him - he is registered and very handsome, a truly impressive animal with rare markings for a Soay. However he is now 4 years old - maybe that is that too old for a Soay tup to sell easily and it would be better to send him off?
The wether was going to go to slaughter with two of last year's wether lambs after the summer - the lambs are still far too small now, and I have no other sheep to go off with him if he was to go now.
I am aware that I can't keep him in that tiny paddock for too long, even less so on his own, but I'm really not sure how to best resolve this in the short term.
- give him some female company (but not sure who to 'sacrifice' to the additional stress of being separated from the rest)
- put the wether in with him, and in the absence of any females they will calm down soon (but the ewes won't be far)
- leave them to fight it out (but I have not enough experience to gauge how far they would go... but maybe I did separate them too quickly today?)
- take them both to slaughter now (but maybe too early for the 'taint' to dissipate?)
Help please!