Soay tups can be vile - we've had a few! They can be OK too. Hopefully yours will calm down a bit when he's been in with the ewes and is back with his chum. We used to give ours a 'bashing stob' to vent their need to smash their heads against something and save our fences from destruction
. As you're going to be mixing him with the ewes soon anyway, perhaps wait until they are together and bring them all in. Be warned - Soay tups jump, especially when they're in a pen, so not only do you have to start again, but you run the risk of being hit on the way and injured. He won't be too bad while he's young, but more so as his horns grow big. We used to place a metal hurdle lying flat over the pen to prevent jumping - only remove it when you've dealt with the tup. At least you have got him while he's young and you can let him see what he's expected to do and not do, and you will have read enough on TAS to know not to try to tame him. Without taming, you can still have a nice handleable animal if you treat him gently but firmly. Being with a quiet chum for most of the year should help to calm him down.
When we fetch any new animals in, we worm them ourselves and just on that occasion we use Zolvix which is pretty sure against most worms, and a flukicide too from the vet although we don't live somewhere where we normally get fluke. For the rest of the time we use Panacur, very occasionally if a sheep is scouring, and we do FECs every now and then - the regime seems to work.
We still have three Soay ewes but so far we haven't bred them...........